Hedman Performance Group

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

Photo of Hedman's HTC Polished SIlver Ceramic Finish

Silver Stainless Long-Tube Headers For '63-82 Corvette w/283-400

STAINLESS STEEL Headers; 1-5/8 in. Tube Dia.; 3 in. Coll.; FULL LENGTH Design- HTC Coated

Part#62306

$1,239.60

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Product Specifications

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

Tube Diameter 1-5/8 in.
Tube Style Long Tubes
Air Conditioning Yes
Automatic Transmission - Column Yes
Automatic Transmission - Floor Yes
Manual Transmission - Column No
Manual Transmission - Floor Yes
Collector Attachment 3 in.
Collector Diameter 3 in.
Collector Size 3 in.
Collector Style BALL and SOCKET Style (Gasketless)
Reducer Outlet Size 2-1/2 in.
Exhaust System Dia 2-1/2 in.
Contents headers, gaskets (when applicable), 3-bolt exhaust adapters, hardware
E.O. # No
Emissions Notes Not Legal For Street Use on '75-Later Model Years! Legal for off-road use only.
Finish HTC Polished Silver Ceramic-Metallic
Finish Type HTC SILVER (polished) Ceramic-metallic Coating
Flange Style Standard
Flange Thickness 0.375 in.
Header Style Long Tube
Notes 63-82 Corvette 283-400
Power Steering Yes
Material T304 Stainless Steel
Tube Design Standard
Tube Length Long Tubes
Tube Material Thickness 16g
Tube Size 1-5/8 in.
Variations 68306, 68308
with A.I.R. System No
with EGR No
Weld-Up No
Tuned No
Bolts/Studs Included Yes
Catalytic Converter(s) Included No
Crossover Pipe Included No
Gasket Or Seal 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, ball and socket reducers (exhaust adapters), gaskets, mounting hardware
Header Material T304 Stainless Steel
Header Finish HTC Polished Silver Ceramic-Metallic
Cylinder Head Port Shape Oval
Cylinder Head Fits Factory GM Aluminum Angle Plug and Straight Plug Heads.
Header Construction T304 STAINLESS STEEL
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

Corvette

Year

C.I.D.

Liter

Block Type

Cylinders

Fuel Type

Drive Type

1963

327

Vehicle Specific Information
Air Conditioning	Not for '67-69 with A/C! 1970 and later with Large Piston A/C need bracket 20110
Power Steering	Yes
Auto Transmission - Column	Yes
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	Yes
Footnotes	(1) Without smog injection or injection heads. (100) Will not fit steering damper inside front crossmember. (103) Will fit with angle plug heads (Chevy aluminum only, L98). (6) Modification to stock exhaust required to retain catalytic converter.
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.

1964

327

Vehicle Specific Information
Air Conditioning	Not for '67-69 with A/C! 1970 and later with Large Piston A/C need bracket 20110
Power Steering	Yes
Auto Transmission - Column	Yes
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	Yes
Footnotes	(1) Without smog injection or injection heads. (100) Will not fit steering damper inside front crossmember. (103) Will fit with angle plug heads (Chevy aluminum only, L98). (6) Modification to stock exhaust required to retain catalytic converter.
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.

1965

327

Vehicle Specific Information
Air Conditioning	Not for '67-69 with A/C! 1970 and later with Large Piston A/C need bracket 20110
Power Steering	Yes
Auto Transmission - Column	Yes
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	Yes
Footnotes	(1) Without smog injection or injection heads. (100) Will not fit steering damper inside front crossmember. (103) Will fit with angle plug heads (Chevy aluminum only, L98). (6) Modification to stock exhaust required to retain catalytic converter.
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.

1966

327

Vehicle Specific Information
Air Conditioning	Not for '67-69 with A/C! 1970 and later with Large Piston A/C need bracket 20110
Power Steering	Yes
Auto Transmission - Column	Yes
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	Yes
Footnotes	(1) Without smog injection or injection heads. (100) Will not fit steering damper inside front crossmember. (103) Will fit with angle plug heads (Chevy aluminum only, L98). (6) Modification to stock exhaust required to retain catalytic converter.
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.

1967

327

Vehicle Specific Information
Air Conditioning	Not for '67-69 with A/C! 1970 and later with Large Piston A/C need bracket 20110
Power Steering	Yes
Auto Transmission - Column	Yes
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	Yes
Footnotes	(1) Without smog injection or injection heads. (100) Will not fit steering damper inside front crossmember. (103) Will fit with angle plug heads (Chevy aluminum only, L98). (6) Modification to stock exhaust required to retain catalytic converter.
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.

1968

327

Vehicle Specific Information
Air Conditioning	Not for '67-69 with A/C! 1970 and later with Large Piston A/C need bracket 20110
Power Steering	Yes
Auto Transmission - Column	Yes
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	Yes
Footnotes	(1) Without smog injection or injection heads. (100) Will not fit steering damper inside front crossmember. (103) Will fit with angle plug heads (Chevy aluminum only, L98). (6) Modification to stock exhaust required to retain catalytic converter.
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.

1969

350

Vehicle Specific Information
Air Conditioning	Not for '67-69 with A/C! 1970 and later with Large Piston A/C need bracket 20110
Power Steering	Yes
Auto Transmission - Column	Yes
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	Yes
Footnotes	(1) Without smog injection or injection heads. (100) Will not fit steering damper inside front crossmember. (103) Will fit with angle plug heads (Chevy aluminum only, L98). (6) Modification to stock exhaust required to retain catalytic converter.
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.

1970

350

Vehicle Specific Information
Air Conditioning	Not for '67-69 with A/C! 1970 and later with Large Piston A/C need bracket 20110
Power Steering	Yes
Auto Transmission - Column	Yes
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	Yes
Footnotes	(1) Without smog injection or injection heads. (100) Will not fit steering damper inside front crossmember. (103) Will fit with angle plug heads (Chevy aluminum only, L98). (6) Modification to stock exhaust required to retain catalytic converter.
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.

1971

350

Vehicle Specific Information
Air Conditioning	Not for '67-69 with A/C! 1970 and later with Large Piston A/C need bracket 20110
Power Steering	Yes
Auto Transmission - Column	Yes
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	Yes
Footnotes	(1) Without smog injection or injection heads. (100) Will not fit steering damper inside front crossmember. (103) Will fit with angle plug heads (Chevy aluminum only, L98). (6) Modification to stock exhaust required to retain catalytic converter.
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.

1972

350

Vehicle Specific Information
Air Conditioning	Not for '67-69 with A/C! 1970 and later with Large Piston A/C need bracket 20110
Power Steering	Yes
Auto Transmission - Column	Yes
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	Yes
Footnotes	(1) Without smog injection or injection heads. (100) Will not fit steering damper inside front crossmember. (103) Will fit with angle plug heads (Chevy aluminum only, L98). (6) Modification to stock exhaust required to retain catalytic converter.
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.

1973

350

Vehicle Specific Information
Air Conditioning	Not for '67-69 with A/C! 1970 and later with Large Piston A/C need bracket 20110
Power Steering	Yes
Auto Transmission - Column	Yes
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	Yes
Footnotes	(1) Without smog injection or injection heads. (100) Will not fit steering damper inside front crossmember. (103) Will fit with angle plug heads (Chevy aluminum only, L98). (6) Modification to stock exhaust required to retain catalytic converter.
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.

1974

350

Vehicle Specific Information
Air Conditioning	Not for '67-69 with A/C! 1970 and later with Large Piston A/C need bracket 20110
Power Steering	Yes
Auto Transmission - Column	Yes
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	Yes
Footnotes	(1) Without smog injection or injection heads. (100) Will not fit steering damper inside front crossmember. (103) Will fit with angle plug heads (Chevy aluminum only, L98). (6) Modification to stock exhaust required to retain catalytic converter.
Emissions Notes	1974 and earlier vehicles WITHOUT A.I.R.; Does not require EO if existing emission controls are not removed.

1975

350

Vehicle Specific Information
Air Conditioning	Not for '67-69 with A/C! 1970 and later with Large Piston A/C need bracket 20110
Power Steering	Yes
Auto Transmission - Column	Yes
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	Yes
Footnotes	(1) Without smog injection or injection heads. (100) Will not fit steering damper inside front crossmember. (103) Will fit with angle plug heads (Chevy aluminum only, L98). (6) Modification to stock exhaust required to retain catalytic converter.
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.

1976

350

Vehicle Specific Information
Air Conditioning	Not for '67-69 with A/C! 1970 and later with Large Piston A/C need bracket 20110
Power Steering	Yes
Auto Transmission - Column	Yes
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	Yes
Footnotes	(1) Without smog injection or injection heads. (100) Will not fit steering damper inside front crossmember. (103) Will fit with angle plug heads (Chevy aluminum only, L98). (6) Modification to stock exhaust required to retain catalytic converter.
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.

1977

350

Vehicle Specific Information
Air Conditioning	Not for '67-69 with A/C! 1970 and later with Large Piston A/C need bracket 20110
Power Steering	Yes
Auto Transmission - Column	Yes
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	Yes
Footnotes	(1) Without smog injection or injection heads. (100) Will not fit steering damper inside front crossmember. (103) Will fit with angle plug heads (Chevy aluminum only, L98). (6) Modification to stock exhaust required to retain catalytic converter.
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.

1978

350

Vehicle Specific Information
Air Conditioning	Not for '67-69 with A/C! 1970 and later with Large Piston A/C need bracket 20110
Power Steering	Yes
Auto Transmission - Column	Yes
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	Yes
Footnotes	(1) Without smog injection or injection heads. (100) Will not fit steering damper inside front crossmember. (103) Will fit with angle plug heads (Chevy aluminum only, L98). (6) Modification to stock exhaust required to retain catalytic converter.
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.

1979

350

Vehicle Specific Information
Air Conditioning	Not for '67-69 with A/C! 1970 and later with Large Piston A/C need bracket 20110
Power Steering	Yes
Auto Transmission - Column	Yes
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	Yes
Footnotes	(1) Without smog injection or injection heads. (100) Will not fit steering damper inside front crossmember. (103) Will fit with angle plug heads (Chevy aluminum only, L98). (6) Modification to stock exhaust required to retain catalytic converter.
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.

1979

350

Vehicle Specific Information
Air Conditioning	Not for '67-69 with A/C! 1970 and later with Large Piston A/C need bracket 20110
Power Steering	Yes
Auto Transmission - Column	Yes
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	Yes
Footnotes	(1) Without smog injection or injection heads. (100) Will not fit steering damper inside front crossmember. (103) Will fit with angle plug heads (Chevy aluminum only, L98). (6) Modification to stock exhaust required to retain catalytic converter.
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.

1980

350

Vehicle Specific Information
Air Conditioning	Not for '67-69 with A/C! 1970 and later with Large Piston A/C need bracket 20110
Power Steering	Yes
Auto Transmission - Column	Yes
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	Yes
Footnotes	(1) Without smog injection or injection heads. (100) Will not fit steering damper inside front crossmember. (103) Will fit with angle plug heads (Chevy aluminum only, L98). (6) Modification to stock exhaust required to retain catalytic converter.
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.

1980

305

Vehicle Specific Information
Air Conditioning	Not for '67-69 with A/C! 1970 and later with Large Piston A/C need bracket 20110
Power Steering	Yes
Auto Transmission - Column	Yes
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	Yes
Footnotes	(1) Without smog injection or injection heads. (100) Will not fit steering damper inside front crossmember. (103) Will fit with angle plug heads (Chevy aluminum only, L98). (6) Modification to stock exhaust required to retain catalytic converter.
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.

1981

350

Vehicle Specific Information
Air Conditioning	Not for '67-69 with A/C! 1970 and later with Large Piston A/C need bracket 20110
Power Steering	Yes
Auto Transmission - Column	Yes
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	Yes
Footnotes	(1) Without smog injection or injection heads. (100) Will not fit steering damper inside front crossmember. (103) Will fit with angle plug heads (Chevy aluminum only, L98). (6) Modification to stock exhaust required to retain catalytic converter.
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.

1982

350

Vehicle Specific Information
Air Conditioning	Not for '67-69 with A/C! 1970 and later with Large Piston A/C need bracket 20110
Power Steering	Yes
Auto Transmission - Column	Yes
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	Yes
Footnotes	(1) Without smog injection or injection heads. (100) Will not fit steering damper inside front crossmember. (103) Will fit with angle plug heads (Chevy aluminum only, L98). (6) Modification to stock exhaust required to retain catalytic converter.
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.

1982

350

Vehicle Specific Information
Air Conditioning	Not for '67-69 with A/C! 1970 and later with Large Piston A/C need bracket 20110
Power Steering	Yes
Auto Transmission - Column	Yes
Auto Transmission - Floor	Yes
Manual Transmission - Column	No
Manual Transmission - Floor	Yes
Footnotes	(1) Without smog injection or injection heads. (100) Will not fit steering damper inside front crossmember. (103) Will fit with angle plug heads (Chevy aluminum only, L98). (6) Modification to stock exhaust required to retain catalytic converter.
Emissions Notes	RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.