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Cometic MLS cylinder head gasket for Pontiac 326/389/421 V8 (4.300in bore, .070in compressed thickness) uses HP shim technology to increase clamp load around the combustion chamber and improve sealability on open-deck blocks. The gasket combines embossed AMP-coated outer layers and uncoated stainless steel shims, with Viton-coated faces. The center shim allows thickness variation, distributes clamp load and limits bore distortion under varied load conditions.
Cometic Pontiac 326/389/421 V8 .070in MLS Cylinder Head Gasket - 4.300in Bore
