Cometic Gasket · New
Cometic 09+ GM LS9 4.100in Bore .051 thick MLX LHS Head Gasket
MPN C5986-051 · Store SKU cgsC5986-051
Supplier stock checked 11/7/2026, 9:32:22 PM UTC. Adding a part does not reserve it.
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Product details
Comprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0.051". Left Side. Cometic MLX (Multi-Layer Stopper) gaskets utilize an integrated stopper layer for combustion chamber sealing and improved clamp load around the cylinder without increasing bore distortion. MLX technology can be found in some head gaskets and are made from the same materials as our MLS Head Gaskets. No sealants or re-torque required. GM LS9/LSA Gen-4 Small Block V8 .051in. MLX Cylinder Head Gasket; 4.100in. Bore; LHS GM LS9/LSA Gen-4 Small Block V8 .051" MLX Cylinder Head Gasket, 4.100" Bore, LHS MLX Gaskets utilize an integrated "stopper" layer for combustion chamber sealing GM LS9/LSA Gen-4 Small Block V8 Cylinder Head Gasket
Manufacturer fitment & guides
Check C5986-051 against the manufacturer’s application information below.
Part-specific notes
- California Proposition 65: Y
