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The Cometic MLX head gasket for GM LSX left‑hand side is specified at a 4.200 in. bore with .052 in. thickness and parallel cooling. MLX gaskets utilize an integrated "stopper" layer to enhance combustion chamber sealing, and the construction improves clamp load distribution without increasing bore distortion, making it suitable where reliable sealing and even clamp force are priorities in high‑output LSX engines.
Cometic GM LSX Left Hand Side 4.200 inch Bore MLX Head Gasket .052 inch Thick With Parallel Cooling
