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Cometic's .070 inch MLS head gasket for Chevrolet 348/409 W-Series Big Block V8 (4.437 in bore) uses multiple embossed stainless steel layers with Viton-coated outer surfaces to handle high temperatures and varied surface finishes. The multi-layer steel construction rebounds to resist corrosion and seals aluminum-to-iron interfaces without sealants; the center shim layer accommodates thickness variation to improve load distribution and reduce bore distortion.
Cometic Chevrolet 348/409 W-Series Big Block V8 .070in MLS Cylinder Head Gasket - 4.437in Bore
