• Raises thermostat housing .40” and provides mount for GM water temp sensor, for an electric gauge or inform an ECU to run EFI. (Use a 3/8” NPT plug if not running a sensor)

• Needed for blow-through supercharger on 1275cc engines running early down-flow or VW Rabbit radiator (not needed for 1098 and 948 engines)

• CNC machined from 6061 aluminum to exacting tolerances in U.S.A at family-owned shop.

• Black anodized.

• Use Moss gaskets 296-381 or equivalent, and coat both sides of both gaskets with Permatex Ultra Gray or Yamabond for best sealing

*NOTE TO UK CUSTOMERS: The European Union may impose vat and handling fee. If ordering multiple products, please email us about consolidating items into a larger box to save on shipping charges.