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Cometic's .045 inch MLS head gasket for Chevrolet 348/409 W-Series Big Block V8 (4.200 in bore) is constructed from multiple embossed stainless steel layers with Viton-coated outer surfaces. The MLS assembly rebounds to resist corrosion and provides reliable sealing between aluminum and iron components without sealants. A center shim layer is uncoated to accommodate thickness variation and help reduce clamp load and bore distortion.
Cometic Chevrolet 348/409 W-Series Big Block V8 .045in MLS Cylinder Head Gasket - 4.200in Bore
