This Product is MADE IN THE USA! Photo of 1 in. tall water neck riser for SB and BB Chevy engines Photo of o-ring on a 1 in. tall water neck riser for SB and BB Chevy engines Photo of port on a 1 in. tall water neck riser for SB and BB Chevy engines Photo of thermostat seat on 1 in. tall SB and BB Chevy water neck riser Photo of back side on 1 in. tall water neck riser for SB and BB Chevy engines

1 IN. BILLET WATER NECK RISER WITH 3/8 IN. NPT PORTS

1 in. Tall, Billet Aluminum, SB and BB Chevy Thermostat Housing Riser with Dual 3/8 in. NPT Ports; Includes 1/4 in. and 3/8 in. Barbed Fittings and O-ring.


Trans-Dapt Performance Products billet aluminum thermostat (water neck) risers can serve multiple functions. They are an easy way to create easy (easier) access to manifold or thermostat housing ports. They also facilitate the installation of a water temp sending unit, temperature gauge, or for adding lines to your intake manifold. Lastly, they are ideal for situations when the vehicle's radiator is positioned higher than the intake manifold.

Trans-Dapt CNC machines these risers from durable T6061 aluminum and clear anodizes them for longlasting looks. A captured o-ring is used to ensure a leakproof installation, and a recessed thermostat groove to allow the thermostat to sit flush with the sealing flange.

Each unit has two 3/8 in. NPT ports, and includes a pair of both 1/4 in. and 3/8 in. hosed barb fittings. 1 in. and 2in. models are available.

Product Specifications

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

  • Contents Billet Aluminum Riser, O-ring, 1/4 and 3/8 in. brass hose fittings (1 pair each)
  • Engine CHEVY SB/BB V8 (early '55-64)
  • Engine CHEVY SB/BB V8 (late '66-75)
  • Finish Clear Anodized
  • Finish Type Clear Anodized
  • Height 1 IN. TALL
  • Port Size 3/8 in. NPT
  • Material Aluminum
  • Seal Type O-RING Style
  • Water Neck Seal Type O-RING Style
  • Fitting Material Brass
  • Fitting Quantity 4
  • Hose Connection Type Push Lock
  • Mount Hole Quantity 2
  • Bolts/Studs Included No
  • Fastener(s) Included No
  • Gasket Or Seal Included Yes
  • Installation Hardware Included No
  • Mounting Hardware Included No
  • O-Ring Included Yes
  • Water Neck Included No
  • Package Contents Billet Aluminum Riser, O-ring, 1/4 and 3/8 in. brass hose fittings (1 pair each)
  • Bolt Hole Quantity 2
  • Fitting Thread 3/8 in.-16
  • Hose ID 1/4 in. or 3/8 in.
  • Neck Angle N/A
  • Spacer Thickness 1 in.
  • Replacement O-Ring 9285
  • California Proposition 65 WARNING: Cancer & Reproductive Harm. For more info visit www.P65Warnings.ca.gov
  • Photo Disclaimer Actual product design, construction, or included components may vary.
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