Cometic C5883-045 MLS Cylinder Head Gasket - .045 inch Bore 4.100 inch LHS | 2007-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Features:

• Fits 2007–2016 6.6L Duramax diesel engines
• Engineered for GM Silverado and Sierra HD trucks
• .045 inch compressed thickness for reliable sealing
• 4.100 inch round bore for precise fitment
• Three-layer MLS construction for added strength
• Left side (LHS) orientation specific
• Handles high combustion pressures and heat cycles
• Seals irregular surfaces with reinforced materials
• Features graphite and armor-clad compounds
• Ideal for stock or performance diesel builds

Keep Your Duramax Sealed Strong With A Trusted Upgrade

When your Duramax starts showing signs of head gasket issues, don’t settle for a temporary fix, upgrade to something that’s built to last. The Cometic C5883-045 MLS Cylinder Head Gasket is the go-to choice for diesel owners who need reliability, whether they’re hauling, daily driving, or pushing for more performance. Designed for the left side of 2007–2016 Silverado and Sierra 2500HD/3500HD trucks, this gasket brings peace of mind with its proven sealing technology. It’s built to handle the heat and pressure that come with big torque and long hours behind the wheel. With its .045 inch compressed thickness and 4.100 inch round bore, it fits like a glove and locks down combustion to keep your engine running smooth. Whether you're planning a fresh rebuild or replacing a failed OEM gasket, this part helps ensure you're not tearing the motor down again anytime soon. Built tough, tested in the real world, and ready to keep your rig running strong.

Designed To Perform Under Pressure Where It Counts Most

The Cometic C5883-045 MLS Cylinder Head Gasket is engineered for precision sealing in high-performance and high-load environments. It features a three-layer multi-layer steel (MLS) design that is built to maintain consistent clamping force even under extreme temperature fluctuations. With a .045 inch compressed thickness and a 4.100 inch round bore, this gasket delivers the dimensional accuracy needed for 6.6L Duramax engines in 2007–2016 GM 2500HD and 3500HD trucks. Its left-side orientation ensures exact fitment for engine rebuilds that require position-specific components. The gasket also includes armor-clad, graphite, and galvanized steel materials that enhance surface conformity and sealing integrity over time. This design helps manage uneven surfaces, minor imperfections, or warpage that can result from years of heat cycles and stress. Whether you're maintaining a workhorse or building for added power, this gasket gives you the sealing strength and longevity required to protect your investment.

Fits: 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Notes:

• Fits 2007–2016 GM 6.6L Duramax engines only
• Designed specifically for the left-hand cylinder head
• .045 inch compressed thickness provides reliable sealing
• 4.100 inch bore size matches OEM chamber dimensions
• Three-layer MLS construction handles heat and pressure
• Not interchangeable with right-hand cylinder head gaskets
• Armor-clad and graphite layers improve surface sealing
• Ideal for engines with mild to moderate modifications
• Proper surface prep is essential for best performance
• Professional installation recommended for long-term reliability