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Cometic top-end gasket kit for GM LMM/LLY Duramax engines, sized for a 4.130in bore and featuring a .047in MLX cylinder head gasket. MLX gaskets use an integrated stopper layer to enhance combustion chamber sealing; the kit supplies the gaskets and seals required for an overhaul. The MLX construction improves clamp load around the cylinder without increasing bore distortion, providing reliable sealing where combustion pressures demand it.
Cometic GM LMM/LLY Duramax Top End Gasket Kit - 4.130in Bore - .047in MLX Cylinder Head Gasket
