The Cometic MLX cylinder head gasket for GM LSX Gen‑4 small block V8 is .040" thick with a 4.165" bore and supports both 1/2" and 3/8" studs on the left hand side. MLX technology increases clamp load around the combustion chamber via HP shim features and an integrated stopper layer to improve sealability on open deck blocks, while embossed outer layers are coated with Viton for corrosion resistance.
Cometic GM LSX Gen-4 Small Block V8 .040in MLX Cyl Head Gskt-4.165in Bore-1/2in and 3/8in Studs-LHS