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The Cometic MLS head gasket for Pontiac 400/428/455 V8 (4.380 inch bore) features multiple embossed stainless steel layers with Viton-coated outer faces and a compressed operating thickness around 0.098 inch. The uncoated stainless center shim permits thickness tuning. This MLS gasket seals without added sealants, resists corrosion and shearing forces between different metals, and helps spread clamp load to minimize bore distortion on high-output engines.
Cometic Pontiac 400/428/455 V8 .086in MLS Cylinder Head Gasket - 4.380in Bore
