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The Cometic MLS cylinder head gasket for Chevrolet 348/409 W-Series Big Block V8 (.027in nominal, 4.375in bore) delivers multi-layer stainless sealing for demanding engine duty. Embossed outer stainless layers coated with Viton provide heat-resistant sealing while the uncoated center shim allows thickness variation. The gasket requires no sealants, tolerates aluminum-to-steel combinations, resists corrosion and helps reduce bore distortion under clamp load.
Cometic Chevrolet 348/409 W-Series Big Block V8 .027in MLS Cylinder Head Gasket - 4.375in Bore
