Hedman Performance Group

dimensions for 68500 series of Hedman Tight Tubes Street Rod Headers.

Photo of header reducers, gaskets and hardware included with Hedman Hedders

Photo of Hedman's HTC Polished SIlver Ceramic Finish

Silver Tight-Tubes Headers For Street Rods/Tri-5s with 283-400

TIGHT TUBES Street Rod Headers; SB Chevrolet 283-400; 1-5/8 In. Tube Diameter, 2-1/2 in. Collector- HTC Polished Silver Ceramic-Metallic Coated Mild Steel

Part#68506

$885.01

Find Local Dealer

Product Specifications

[PLEASE REVIEW THE FOLLOWING PRODUCT ATTRIBUTES & VEHICLE APPLICATION FOOTNOTES SPECIFIC TO YOUR VEHICLE, THOROUGHLY]

Tube Diameter 1-5/8 in.
Tube Style Tight Tubes
Air Conditioning Yes
Automatic Transmission - Column Yes
Automatic Transmission - Floor Yes
Manual Transmission - Column Yes
Manual Transmission - Floor Yes
Collector Attachment 2-1/2 in.
Collector Diameter 2-1/2 in.
Collector Size 2-1/2 in.
Collector Style 3-Bolt Gasket Style Flange
Reducer Outlet Size 2 in.
Exhaust System Dia 2 in.
Contents Header(s), new bolts, gasket(s) to head, reducer(s) and hardware, instructions
E.O. # No
Emissions Notes Not Legal For Street Use on '75-Later Model Years! Legal for off-road use only.
Engine Chevy SB 283-400
Finish HTC Polished Silver Ceramic-Metallic
Finish Type HTC SILVER (polished) Ceramic-metallic Coating
Flange Style Standard
Flange Thickness 0.3125 in.
Header Port Shape Oval Port
Header Style TIGHT TUBES
Notes 55-57 Chevrolet Passenger Cars 283-400 Tight Tube
Port Shape Oval
Power Steering Yes
Material Mild Steel
Tube Design Standard
Tube Length Tight Tubes
Tube Material Thickness 16g
Tube Size 1-5/8 in.
Variations 68500
with A.I.R. System No
with EGR No
Weld-Up No
Tuned No
Bolts/Studs Included Yes
Catalytic Converter(s) Included No
Collector Bolts Included Yes
Crossover Pipe Included No
Gasket Or Seal Included Yes
Header Fasteners Included Yes
Installation Hardware Included Yes
Motor Mounts Included No
Mounting Hardware Included Yes
Reducers Included Yes
Y-Pipe Included No
Quantity Sold as a pair.
Primary Tube Gauge 16g
Primary Tube Diameter (in) 1.625 in.
Package Contents Headers, reducers (exhaust adapters), gaskets, mounting hardware
Header Material Mild Steel
Header Finish HTC Polished Silver Ceramic-Metallic
Cylinder Head Port Shape Oval
Cylinder Head Stock Profile Heads
Header Construction MILD STEEL- Standard-Duty
Replacement Gasket 27520
Replacement Head Flange Gasket 27520
California Proposition 65 WARNING: Cancer & Reproductive Harm. For more info visit www.P65Warnings.ca.gov

Vehicle Applications

Chevrolet

Bel Air

Year

C.I.D.

Liter

Block Type

Cylinders

Fuel Type

Drive Type

1955

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1955

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1955

265

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1955

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1955

327

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1955

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1955

307

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1956

327

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1956

307

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1956

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1956

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1956

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1956

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1956

265

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1957

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1957

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1957

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1957

265

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1957

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1957

327

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1957

307

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

One-Fifty Series

Year

C.I.D.

Liter

Block Type

Cylinders

Fuel Type

Drive Type

1955

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1955

327

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1955

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1955

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1955

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1955

265

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1955

307

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1956

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1956

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1956

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1956

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1956

265

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1956

327

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1956

307

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1957

265

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1957

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1957

327

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1957

307

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1957

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1957

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1957

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

Two-Ten Series

Year

C.I.D.

Liter

Block Type

Cylinders

Fuel Type

Drive Type

1955

327

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1955

307

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1955

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1955

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1955

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1955

265

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1955

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1956

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1956

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1956

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1956

265

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1956

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1956

327

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1956

307

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1957

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1957

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1957

265

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1957

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1957

327

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1957

307

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

1957

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.
Engine Family	SB Chevy 283-400 (Gen 1)

STREET ROD

Year

C.I.D.

Liter

Block Type

Cylinders

Fuel Type

Drive Type

1923

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1923

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1923

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1923

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1924

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1924

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1924

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1924

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1925

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1925

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1925

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1925

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1926

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1926

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1926

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1926

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1927

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1927

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1927

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1927

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1928

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1928

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1928

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1928

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1929

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1929

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1929

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1929

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1930

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1930

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1930

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1930

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1931

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1931

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1931

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1931

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1932

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1932

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1932

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1932

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1933

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1933

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1933

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1933

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1934

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1934

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1934

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1934

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1935

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1935

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1935

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1935

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1936

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1936

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1936

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1936

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1937

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1937

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1937

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1937

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1938

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1938

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1938

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1938

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1939

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1939

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1939

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1939

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1940

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1940

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1940

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1940

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1941

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1941

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1941

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1941

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1942

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1942

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1942

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1942

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1943

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1943

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1943

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1943

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1944

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1944

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1944

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1944

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1945

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1945

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1945

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1945

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1946

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1946

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1946

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1946

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1947

400

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1947

283

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1947

305

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)

1947

350

Vehicle Specific Information
Footnotes	(103) Will fit with angle plug heads (Chevy aluminum only, L98).
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Engine Family	SB Chevy 283-400 (Gen 1)