Cometic C5883-040 MLS Cylinder Head Gasket - .040 inch Bore 4.100 inch LHS | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Features:

• Fits 2001-2016 6.6L Duramax diesel engines
• Designed for left-hand side cylinder head
• Compatible with Silverado and Sierra HD models
• .040 inch compressed gasket thickness
• 4.100 inch round bore configuration
• Three-layer multi-layer steel (MLS) construction
• Reinforced with graphite and galvanized steel
• Seals uneven or resurfaced head surfaces
• Built for high-pressure and high-heat environments
• Ideal for performance and heavy-duty applications

Keep The Pressure In And The Leaks Out

If you’re already elbow-deep in a Duramax build, the last thing you want to gamble on is the head gasket. The Cometic C5883-040 MLS Cylinder Head Gasket is designed to seal it up right the first time—especially when you're running more power or just want rock-solid reliability. This version is built specifically for the left-hand side of 2001-2016 Silverado and Sierra 2500HD/3500HD trucks, and it's ready to take on the demands of towing, hauling, or performance upgrades. With a .040 inch compressed thickness and a 4.100 inch bore, it’s dialed in for precision and strength without sacrificing fitment. Whether you're working with a resurfaced block or just chasing long-term durability, this gasket can handle it. Reinforced materials and multi-layer construction give you the confidence to push harder without second-guessing your seal. It’s built to work, built to last, and built to handle whatever you throw at your truck.

Designed To Withstand The Demands Of A True Workhorse

The Cometic C5883-040 MLS Cylinder Head Gasket delivers proven sealing performance through its three-layer multi-layer steel (MLS) construction and reinforced materials. Engineered with a .040 inch compressed thickness and a 4.100 inch round bore, this gasket ensures uniform load distribution across the left-hand cylinder head of your 6.6L Duramax engine. It is specifically designed for use on 2001-2016 Chevrolet Silverado and GMC Sierra 2500HD/3500HD trucks, providing OEM-level fitment with aftermarket-grade durability. The gasket's layering incorporates armor-clad, graphite, and galvanized steel compounds to accommodate irregular surface conditions and resist the stresses of extreme heat and high combustion pressure. This makes it ideal for trucks that see heavy-duty use or operate under performance tuning. The left-hand side orientation ensures compatibility with engine layout and cylinder head configuration. For builders, mechanics, or diesel owners seeking a high-integrity seal that stands up to the realities of real-world conditions, this gasket is a critical component.

Fits: 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 diesel engines
• Fits GM Silverado and Sierra 2500HD/3500HD models
• Engineered specifically for the left-hand cylinder head
• Compressed thickness measures .040 inch
• 4.100 inch bore size with a round bore shape
• Constructed using three-layer multi-layer steel (MLS)
• Reinforced with armor-clad, graphite, and galvanized steel materials
• Intended for sealing irregular or resurfaced cylinder head surfaces
• Ideal for high-compression, high-heat, or performance applications
• Ensure correct orientation and specs before ordering