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The Cometic MLS head gasket for GM LS9/LSA Gen‑4 small block (4.100" bore, .040" thickness) uses multiple embossed stainless steel layers with Viton-coated outer faces to provide maximum sealing performance without sealants. Compressed operating thickness is 0.098" and an uncoated center shim lets builders vary thickness while embossed layers rebound, resist corrosion and handle dissimilar head/block shearing for durable sealing.
Cometic 09+ GM LS9 4.100in Bore .040 thick MLS RHS Head Gasket
