Cometic C5591-066 MLX Top End Gasket Set

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The Cometic C5591-066 MLX Head Gasket for your 3.9L 4BT Cummins consists of multiple layers of stainless steel for increased strength. The MLX (Multi-Layer Stopper) gaskets utilize an integrated stopper layer to withstand the additional pressures of a diesel engine for improved combustion chamber sealing and clamp load around the cylinder without increasing bore distortion. Compressed operating thickness is .066.  Features: MLX Construction 4.188" Gasket Bore .066” Compressed Thickness  Improved Sealing and Clamp Load No Sealants or Re-Torque Required