Exhaust Gaskets SBF 289-351W w/Ford N-Heads

The Exhaust Gaskets SBF 289-351W w/Ford N-Heads from REMFLEX are purpose-built header gaskets designed for small block Ford engines equipped with N-port cylinder heads. These gaskets seal the critical junction between your exhaust manifolds or headers and the cylinder head, preventing exhaust leaks that rob horsepower and create unwanted noise. Whether you're building a street engine, restoring a classic Ford, or upgrading an existing setup, proper gasket selection is non-negotiable for reliable performance and longevity.

REMFLEX gaskets are manufactured from high-temperature graphite composite material, engineered to withstand the extreme thermal cycling and pressure cycles inherent to exhaust systems. The rectangular port design measures 1.750 x 1.625 inches, matching the port configuration of Ford N-head cylinder heads precisely. This graphite construction provides superior conformability compared to traditional cork or asbestos gaskets, allowing the material to compress and seal even on imperfect surfaces while resisting blowout from back-pressure spikes. The pair configuration (two gaskets per package) covers both exhaust ports on your small block Ford platform.

These gaskets are ideal for anyone working on 289, 302, or 351W small block Fords with N-port heads, including street rods, muscle cars, and vintage truck builds. Installation is straightforward—simply position the gaskets between your exhaust manifold or header flanges and the cylinder head before bolting down. Because REMFLEX graphite gaskets maintain a stable seal across multiple heat cycles, you'll experience fewer exhaust leaks over time compared to conventional alternatives, translating to better scavenging, cleaner underhood appearance, and more reliable cold starts. Proper torque specification and use of quality fasteners are essential for optimal performance.