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

Features:

• .053" thickness with 4.130" bore diameter
• Fits 2001-2016 6.6L Duramax applications
• Multi-layer stainless steel construction
• Integrated stopper layer improves sealing
• Enhanced clamp load around cylinder bores
• Reduces risk of combustion chamber leaks
• Minimizes bore distortion under pressure
• No sealants or re-torque required
• Ideal for high-performance and diesel builds
• Designed for long-term durability and strength
• Engineered to support increased cylinder pressures

Keep Combustion Where It Belongs With Zero Guesswork

When you’re building or upgrading a 6.6L Duramax, sealing the heads properly is not something you want to leave to chance. The Cometic C15375-053 MLX Cylinder Head Gasket is built for serious performance and long-term reliability, making it the go-to choice for diesel builders and high-torque applications. It features a .053 inch thickness with a 4.130 inch bore, making it ideal for precise engine builds that need maximum seal integrity. The MLX design uses an integrated stopper layer to enhance combustion sealing without distorting the cylinder bore, helping your engine stay efficient and protected under pressure. Whether you're replacing a blown gasket or building from the block up, this gasket takes the stress out of the job by eliminating the need for re-torquing or messy sealants. It's a proven upgrade that fits 2001-2016 Silverado and Sierra 2500HD or 3500HD models equipped with the 6.6L Duramax. If you want a gasket that holds strong under boost, towing loads, or aggressive tuning, this is the one that delivers without compromise.

Advanced Sealing Technology For High Pressure Duramax Builds

The Cometic C15375-053 MLX head gasket is engineered with performance and precision in mind, using a multi-layer stainless steel construction to handle the high cylinder pressures of the 6.6L Duramax. Its integrated stopper layer is the standout feature, applying focused clamp load around the combustion chamber without increasing bore distortion. This ensures a superior seal where it matters most, even under extreme thermal and mechanical stress. The gasket's .053 inch thickness and 4.130 inch bore make it a perfect match for many aftermarket and factory-spec builds. Because of its advanced design, no additional sealants or re-torqueing are needed after install, which simplifies the process while improving long-term dependability. This gasket fits Duramax-powered GM 2500HD and 3500HD models from 2001 through 2016, making it a trusted option for both street and performance applications. For serious builders looking to maintain tight tolerances and reliable combustion sealing, the Cometic MLX is a smart, race-proven choice.

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:

• Designed for 2001-2016 6.6L Duramax engines
• .053" thickness with 4.130" bore size
• Compatible with Silverado and Sierra 2500HD/3500HD
• MLX gasket includes integrated stopper layer
• Improves combustion sealing and clamp load
• Reduces bore distortion under high pressure
• Multi-layer stainless steel construction for durability
• No re-torque or sealant required after installation
• Ideal for performance, towing, or high boost builds
• Must match proper bore and thickness for your setup
• Professional installation recommended for best results