Cometic C5955-067 0.067" MLX Head Gasket for 1989-98 5.9L Cummins (4.10")

Vehicle Fitment

• Dodge / Ram 5.9L Cummins 12-Valve (1989-1998), 4.100" bore
• D250, D350, W250, W350, Ram 2500 / 3500 with 5.9L 6BT engine

Features

• MLX (Multi-Layer Xtreme) steel construction for maximum sealing strength
• 0.067" compressed thickness for a robust and reliable seal
• Five-layer stainless steel design for durability and recovery
• Locking bore "stopper" layer to maintain combustion chamber seal
• Embossed outer layers coated with high-temperature elastomer (Viton)
• No sealant or re-torque needed thanks to precision embossing
• Maintains even clamp load to reduce bore distortion
• Built to withstand high-combustion pressure and harsh sealing conditions

Specifications

• Part Number: C5955-067
• Material: Multi-Layer Xtreme Steel (MLX)
• Compressed Thickness: 0.067" (~1.70 mm)
• Bore Size: 4.100" (~104.14 mm)
• Number of Layers: 5
• Bore Shape: Round
• Orientation: None (non-side specific)

Included Components

• 1x MLX head gasket - Cometic C5955-067

Product Description

The Cometic C5955-067 MLX head gasket is purpose-built for the 5.9L (6BT) Cummins diesel engine, particularly in Dodge and Ram trucks from 1989 to 1998. With a 4.100" bore and a thick 0.067" compressed height, this gasket offers exceptional sealing strength - ideal for high-performance or heavy-duty diesel builds.

Its five-layer construction, combined with a locking "stopper" ring, ensures a tight seal under extreme combustion pressure while minimizing bore distortion. The embossed outer layers, coated with a heat-resistant elastomer, provide both durability and flexibility for thermal cycling.

No additional sealants or re-torque is required once installed correctly. Just make sure the head and block decks are clean and flat before torquing, and you'll benefit from reliable long-term sealing, even under demanding high-output conditions.