Description
Supercharger base gasket to manifold. Made in the USA by JB Performance. Fits Holley/B&M/Weiand/Mercruiser 256. Will not swell with different fuel types. It also works very well with insulating against the heat soak from the supercharger.

Nissan M62 press on pulley 2.64" (Factory Size)
JB Performance Holley/B&M/Weiand 250/256 and 6-71/8-71 blower to carburetor base gasket 