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The Cometic MLS cylinder head gasket for Chevrolet 348/409 W-Series Big Block V8 (.070in nominal, 4.375in bore) uses three to five stainless steel layers to deliver a resilient seal for high-output engines. Embossed outer layers are coated with Viton for heat and chemical resistance, while the uncoated center shim can be customized for thickness. The gasket needs no sealants, handles aluminum-to-iron interfaces and helps conform clamp load to limit bore distortion.
Cometic Chevrolet 348/409 W-Series Big Block V8 .070in MLS Cylinder Head Gasket - 4.375in Bore
