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The Cometic MLS cylinder head gasket for Chevrolet 348/409 W-Series Big Block V8 (.030in nominal, 4.375in bore) provides a durable multi-layer steel seal for high-output engines. Its embossed outer layers feature a Viton coating for heat resistance and corrosion resistance, while an uncoated stainless center shim can be varied to meet thickness needs. No sealants required; it withstands dissimilar-material shear and helps distribute clamp load to limit bore distortion.
Cometic Chevrolet 348/409 W-Series Big Block V8 .030in MLS Cylinder Head Gasket - 4.375in Bore
