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This Cometic MLS head gasket is specified for Chevrolet Mark‑IV big block V8 engines with a 4.320" bore and a compressed operating thickness of 0.051". The multi‑layer steel construction uses embossed outer layers coated with Viton for heat and chemical resistance and an uncoated stainless shim layer; MLS design provides robust sealing across differing head/block materials and does not require sealants.
Cometic Chevy BB Gen IV 396/402/427/454 H/G 4.320 inch Bore .051 inch MLS Head Gasket
