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The Cometic MLS cylinder head gasket for Chevrolet 348/409 W-Series Big Block V8 (.120in nominal, 4.200in bore) offers a multi-layer steel seal for high-output engines. Its embossed stainless outer layers are coated with Viton and the uncoated stainless center shim can be varied for thickness. The gasket needs no sealants, resists dissimilar-material shearing, and helps distribute clamp load to reduce bore distortion.
Cometic Chevrolet 348/409 W-Series Big Block V8 .120in MLS Cylinder Head Gasket - 4.200in Bore
