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.
- MLX Construction
- 4.188" Gasket Bore
- .066” Compressed Thickness
- Improved Sealing and Clamp Load
- No Sealants or Re-Torque Required