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The Cometic MLX head gasket for Cummins 3.9L 4BT engines provides a .067" cylinder thickness for a 4.100" bore and employs MLX construction with a stopper layer for improved combustion sealing. Made from multi-layer stainless materials and coated with Viton, the gasket increases clamp retention around the cylinder without increasing bore distortion and seals effectively without sealants.
Cometic Cummins 3.9L 4BT .067in MLX Cylinder 4.100in Bore Head Gasket
