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The Cometic MLS head gasket for GM/Mercury Marine 525/625 502 Gen‑VI Big Block V8 is a .040 in compressed thickness gasket with a 4.470 in bore. Cometic details embossed stainless steel outer layers coated with Viton for heat resistance, plus a center uncoated stainless shim layer. MLS construction is emphasized for sealing performance in high-output and harsh sealing environments.
Cometic GM/Mercury Marine 525/625 502 Gen-VI Big Block V8 .040in MLS Cylinder 4.470in Bore HG
