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Cometic MLS cylinder head gasket for GM L42/L61 Gen‑1/2 ECOTEC engines, with a nominal .051 in thickness and an 89 mm bore; market notes reference a compressed operating thickness of 0.036 in. The gasket combines multiple embossed stainless steel layers with Viton‑coated outer faces and an uncoated center shim to provide corrosion resistance and sealing strength. MLS construction seals aluminum and iron head/block pairings without sealants and helps reduce clamp load and bore distortion.
Cometic GM L42/L61 Gen-1/2 ECOTEC .051in MLS Cylinder Head Gasket - 89mm Bore
