Exhaust Gaskets - 426 Hemi

The Exhaust Gaskets for 426 Hemi engines are precision-engineered header and manifold seals designed for classic Mopar muscle cars and high-performance builds. These gaskets prevent exhaust leaks at the critical connection point between the cylinder head and exhaust manifold, maintaining engine efficiency and reducing unwanted heat transfer into the engine bay. Built for enthusiasts who demand reliability in vintage and restored 426 Hemi applications, this pair provides the OEM-quality fit needed for street and show vehicles alike.

Each gasket features a steel core laminate construction that resists warping and thermal degradation under the extreme temperatures of a 426 Hemi exhaust stream. The 1.740 x 1.840 rectangular port design matches factory Mopar specifications precisely, ensuring a tight seal without modification to manifold or head surfaces. Steel core laminates offer superior durability compared to standard graphite gaskets, maintaining compression and preventing blow-out even with aggressive tuning or prolonged high-heat operation typical of Hemi engine builders.

Restorers, hot rodders, and engine rebuilders rely on these gaskets when assembling or refreshing 426 Hemi powerplants. Installation is straightforward—simply position the pair between the manifold flanges and cylinder heads, then torque fasteners to factory specification for a leak-free seal that lasts. These gaskets are compatible with original and reproduction exhaust manifolds for first-generation Mopar hemis.