Supercharger Base Gasket

The Weiand Supercharger Base Gasket (MPN 6900) is a critical OEM-quality composite seal engineered for supercharger installations on 142-displacement blowers. As an experienced mechanic, you know that gasket selection directly impacts boost stability, reduces risk of manifold leaks under high pressure, and maintains proper air-fuel charge delivery. This precision-machined gasket sits between the supercharger base and the intake manifold, creating an airtight seal that prevents pressurized air from escaping and contaminating your engine bay with fuel vapor.

Constructed from composite material, the Weiand base gasket offers superior thermal stability compared to cork or paper alternatives, resisting degradation under sustained boost temperatures and repeated pressure cycles. The composite construction also provides excellent compressibility, ensuring consistent sealing performance across the gasket face even after multiple engine heat cycles. With dimensions of 10.55 x 14.3 inches and minimal thickness at 0.5 inches, this gasket is engineered to fit precisely within the Weiand 142 supercharger family, maintaining tight tolerances that prevent blow-by and turbo lag caused by air leakage.

Supercharger base gasket replacement becomes essential during any blower rebuild, installation, or top-end engine work where the manifold-to-supercharger interface is disturbed. Whether you're upgrading a street performance engine, servicing a track vehicle, or restocking your shop inventory, this OEM Weiand gasket guarantees proper sealing without the need for after-market workarounds. Installation pairs seamlessly with stock Weiand 142 supercharger hardware and existing intake manifold mounting points, making it the preferred choice for professionals and enthusiasts who demand reliability under boost.