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.. Cometic GM LB7/LLY/LBZ/LMM/LGH/LML Duramax .053in MLX Cylinder 4.130in Bore LHS Head Gasket. GM LB7/LLY/LBZ/LMM/LGH/LML Duramax .053in. MLX Cylinder Head Gasket; 4.130in. Bore; LHS. GM LB7/LLY/LBZ/LMM/LGH/LML Duramax .053" MLX Cylinder Head Gasket, 4.130" Bore, LHS. GM LB7/LLY/LBZ/LMM/LGH/LML Duramax Cylinder Head Gasket. GM LB7/LLY/LBZ/LMM/LGH/LML Head Gasket L. Requires No Sealants Or Re-Torque. GM 6.6L DURAMAX 01-16 4.130in.. Engine Cylinder Head Gasket. Cylinder Head Gasket

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