Cometic C5855-065 ISB MLX Cylinder Head Gasket - .065 inch Bore 4.100 inch | 1998-2002 Dodge RAM 2500/3500 5.9L Cummins

Features:

• Fits 1998–2002 Dodge RAM 2500 and 3500
• Designed for 5.9L Cummins ISB engines
• .065 inch compressed gasket thickness
• 4.100 inch round bore design
• Five-layer MLS construction for strong sealing
• Reinforced with graphite and galvanized steel
• Seals uneven and irregular mating surfaces
• Handles high pressure and extreme heat
• Ideal for performance and heavy-duty use
• No orientation required for installation
• Engineered for long-lasting durability

Seal Your Cummins With Confidence Every Time You Torque It Down

When it comes to rebuilding or upgrading your 5.9L Cummins, using the right head gasket is one of the smartest decisions you can make, and the Cometic C5855-065 ISB MLX Head Gasket makes that decision easy. Whether you're restoring a high-mileage workhorse or squeezing out more performance from your build, this gasket is built to handle the pressure. With a .065 inch compressed thickness and a 4.100 inch round bore, it fits your 1998–2002 Dodge RAM 2500 or 3500 like a glove. The reinforced multi-layer construction locks in combustion and keeps coolant and oil exactly where they should be. You’ll gain peace of mind knowing your head and block are sealed with premium materials designed to hold up under extreme heat, stress, and cylinder pressure. It’s the kind of upgrade you install once and trust for the long haul. If you want to avoid future headaches and build it right the first time, this gasket brings durability and performance together in one rock-solid solution.

Designed To Withstand Boost Pressure And Heat Cycles With Ease

The Cometic C5855-065 ISB MLX Cylinder Head Gasket features a five-layer multi-layer steel (MLS) design that offers high-integrity sealing across varying temperatures and engine loads. Engineered specifically for 1998–2002 5.9L Cummins-powered Dodge RAM 2500 and 3500 trucks, this gasket delivers a .065 inch compressed thickness and a 4.100 inch bore for precise fitment and performance. The use of reinforced materials such as armor-clad, graphite, and galvanized steel allows it to conform to minor imperfections in cylinder head and block surfaces, helping prevent leaks under pressure. Its round bore design enhances sealing performance around the combustion chamber, making it ideal for trucks running elevated boost levels or hauling heavy loads regularly. Unlike stock gaskets that may deform or fail with heat cycling, this MLX gasket is built to maintain its structure over time. The no-orientation installation also streamlines your rebuild process, reducing guesswork in high-stress environments. Whether for towing, performance, or reliability, this gasket meets the demands of high-output diesel platforms with a design that’s proven in the field.

Fits: 1998, 1999, 2000, 2001, 2002 Dodge RAM 2500/3500 5.9L Cummins

Notes:

• Fits 1998–2002 Dodge RAM 2500 and 3500 with 5.9L Cummins ISB engines.
• Compressed thickness is .065 inch with a 4.100 inch round bore.
• Constructed using five-layer MLX (Multi-Layer Extreme) steel technology.
• Engineered to handle high cylinder pressures and heat cycles in diesel applications.
• Reinforced with graphite, galvanized steel, and armor-clad materials for durability.
• Designed to seal irregular or slightly warped surfaces between the block and head.
• No specific orientation is required during installation.
• Ideal for high-performance builds, towing applications, and heavy-duty use.
• Recommended for use with properly machined head and block surfaces.
• Provides a reliable OE replacement and a performance upgrade in one package.