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Cometic MLS cylinder head gasket for GM L42/L61 Gen‑1/2 ECOTEC engines, listed with a nominal .045 in thickness and an 89 mm bore; the market description cites a compressed operating thickness of 0.036 in. Multiple embossed stainless layers with Viton coating on the outer faces and an uncoated shim offer sealing strength, rebound, and corrosion resistance. MLS construction seals aluminum heads to aluminum or cast‑iron blocks without sealants while improving load distribution.
Cometic GM L42/L61 Gen-1/2 ECOTEC .045in MLS Cylinder Head Gasket - 89mm Bore
