.053" inch MLX Cylinder Head Gasket - 4.130" inch Bore

Features:

• .053" thickness with 4.130" bore diameter
• Fits 2001-2016 6.6L Duramax diesel engines
• Designed for GM 2500HD and 3500HD trucks
• Multi-layer stainless steel construction
• Integrated stopper layer for better sealing
• Improved clamp load without bore distortion
• No sealants or retorqueing required
• Built for high-pressure combustion environments
• Ideal for performance, towing, or heavy-duty use
• Reliable solution for preventing head gasket failure
• Supports higher power and boost applications

Seal Your Duramax Build With Confidence Every Time

When you're building or repairing a 6.6L Duramax, the last thing you want to deal with is a head gasket that can’t hold up under pressure. The Cometic C15376-053 MLX Cylinder Head Gasket gives you the peace of mind to push your build harder, knowing you’re backed by advanced sealing technology. Whether you’re towing heavy loads or running added boost, this gasket is designed to hold tight without compromising performance. It features a .053 inch thickness with a 4.130 inch bore, and fits GM Silverado and Sierra 2500HD or 3500HD models from 2001 to 2016. With no need for re-torqueing or sealants, you can get the job done cleanly and efficiently without worrying about leaks down the road. The integrated stopper layer is engineered to eliminate common failure points around the combustion chamber, especially under extreme heat and pressure. If you’re upgrading your Duramax and want long-term reliability without cutting corners, this gasket is a smart move.

Built For Maximum Combustion Seal And Cylinder Stability

The Cometic C15376-053 MLX head gasket is engineered with a multi-layer stainless steel design that is purpose-built for the demanding environment of the 6.6L Duramax. At .053 inches thick with a 4.130 inch bore, it offers precise fitment for performance and OE rebuilds alike. The real standout feature is the integrated stopper layer, which applies additional clamp load around the combustion chamber without distorting the cylinder bore. This results in more consistent sealing under high cylinder pressures, which is critical for diesel applications under load or boost. Like all MLX gaskets, it does not require sealants or post-install re-torquing, simplifying the installation process and reducing long-term maintenance concerns. The materials and construction are similar to Cometic’s proven MLS designs but optimized for greater combustion sealing in higher stress environments. It’s an ideal upgrade for anyone looking to reinforce the most critical sealing surface in a Duramax engine build.

Fitment: 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Notes:

• Fits 2001-2016 GM Silverado and Sierra 2500HD/3500HD
• Designed specifically for 6.6L Duramax diesel engines
• .053" thickness with 4.130" bore diameter
• MLX gasket includes integrated stopper layer
• Improves combustion sealing and clamp load control
• Reduces bore distortion under high cylinder pressure
• Multi-layer stainless steel construction for durability
• No additional sealants or re-torqueing required
• Ideal for performance, towing, or boosted applications
• Should be matched carefully to engine specs and build
• Professional installation recommended for proper sealing