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Cometic's .051 inch MLS head gasket for Chevrolet 348/409 W-Series Big Block V8 (4.437 in bore) is built from multiple embossed stainless steel layers with Viton-coated outer faces for heat resistance and corrosion protection. The multi-layer design rebounds and seals aluminum-to-iron interfaces without sealant, while the uncoated center shim layer provides thickness variation accommodation to reduce clamp load and bore distortion.
Cometic Chevrolet 348/409 W-Series Big Block V8 .051in MLS Cylinder Head Gasket - 4.437in Bore
