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Cometic MLS cylinder head gasket for Pontiac 326/389/421 V8 (4.300in bore, .092in compressed thickness) uses HP shim technology to boost clamp load around the combustion chamber and improve sealability on open-deck blocks. Multiple embossed layers of AMP-coated and uncoated stainless steel with Viton-coated outer faces provide heat and sealing resilience. The center shim layer lets thickness be tuned, distributing load and reducing bore distortion under demanding conditions.
Cometic Pontiac 326/389/421 V8 .092in MLS Cylinder Head Gasket - 4.300in Bore
