Pontiac Exhaust Gaskets

The Mr. Gasket Pontiac Exhaust Gaskets (SKU: MRG5921) are premium header and manifold gaskets engineered for Pontiac V8 engines where reliability and heat resistance are non-negotiable. These gaskets seal the critical junction between your exhaust manifold and cylinder head—a high-stress zone that endures extreme temperatures and constant pressure cycling. Any leak at this interface robs horsepower, creates diagnostic hassles with oxygen sensors, and invites exhaust odors into the cabin, making quality gaskets essential for every serious Pontiac build.

Built with a steel core laminate construction, these gaskets feature an Ultra-Seal design that maintains integrity across repeated thermal expansion and contraction cycles. The 1.940 x 1.550 inch oval D-port configuration matches OEM Pontiac specifications precisely, ensuring bolt-hole alignment and even clamping force distribution. Steel core reinforcement prevents creep—the gradual compression that leads to blown gaskets—while the laminated facing material accommodates slight surface irregularities on cast iron manifolds without sacrificing seal integrity. This pair is rated for stock and moderately modified engines, making them ideal for restorations, performance rebuilds, and daily drivers alike.

Mechanics and enthusiasts restoring or tuning Pontiac V8s—whether GTO, Firebird, Bonneville, or Grand Prix platforms—rely on these gaskets to prevent exhaust leaks that compromise emissions readings and engine efficiency. Installation requires only basic hand tools and careful bolt torque sequencing; the gasket pair replaces both sides simultaneously, eliminating the temptation to reuse old gaskets on one bank. For anyone serious about maintaining a Pontiac V8 engine bay without exhaust leaks, proper manifold gaskets are the foundation of any reliable build.