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Cometic's MLS head gasket for Chevrolet 348/409 W-Series Big Block V8 (4.437 in bore) is a .040 inch compressed-thickness multi-layer steel gasket with embossed outer layers coated in Viton. Its layered stainless-steel construction rebounds, resists corrosion and seals aluminum-to-iron interfaces without sealants. The center shim layer accommodates thickness variation and helps reduce clamp load and bore distortion.
Cometic Chevrolet 348/409 W-Series Big Block V8 .040in MLS Cylinder Head Gasket - 4.437in Bore
