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The Cometic MLS cylinder head gasket for Chevrolet 348/409 W-Series Big Block V8 (.080in nominal, 4.375in bore) offers multi-layer stainless sealing suitable for high-output builds. Embossed outer layers receive a Viton coating that resists heat and harsh sealing environments while the uncoated center shim can be varied to match thickness requirements. Requires no sealants; the design resists corrosion, tolerates dissimilar-material shear and helps distribute clamp load to reduce bore distortion.
Cometic Chevrolet 348/409 W-Series Big Block V8 .080in MLS Cylinder Head Gasket - 4.375in Bore
