Cometic C15376-062 LHS MLX Cylinder Head Gasket - .062 inch Bore 4.130 inch | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Features:

• Fits 2001–2016 6.6L Duramax engines
• Designed for left-hand cylinder head
• .062" compressed thickness for optimal sealing
• 4.130" round bore for accurate fitment
• Five-layer stainless steel construction
• Seals irregular or imperfect block surfaces
• Reinforced with graphite and armor-clad material
• Galvanized steel core adds structural strength
• Handles high boost and heavy load use
• No re-torque required after installation
• Ideal for performance and towing applications
• Also fits 2007 Classic Silverado/Sierra models

The Left Side Gasket That Refuses To Back Down

When you’re rebuilding the top end of your 6.6L Duramax and aiming for performance that lasts, you want a head gasket that works as hard as your truck does. The Cometic C15376-062 LHS MLX Cylinder Head Gasket is designed to handle heat, boost, and heavy loads without flinching. Built for the left-hand side of 2001–2016 Silverado and Sierra 2500HD/3500HD trucks, this gasket offers an exact fit with the durability you need for both stock and tuned applications. Whether you're towing up a grade or running a tuned setup, you need reliable sealing from the start, and this gasket delivers. Its .062-inch thickness helps maintain tight compression while sealing against surface irregularities that might come with age or hard use. It’s also perfect for 2007 Classic models, making it a versatile choice for long-term reliability. If you're looking to fix it right the first time and keep your Duramax running strong, this is the piece to start with.

Engineered To Tackle The Demands Of Duramax Power

The Cometic C15376-062 LHS MLX Head Gasket is built for high-pressure environments and precision sealing on the 6.6L Duramax diesel platform. With a 4.130-inch round bore and a five-layer stainless steel construction, this gasket is designed to maintain combustion integrity under extreme cylinder pressures. Its .062-inch compressed thickness helps achieve a consistent seal, while compensating for minor block or head surface imperfections. The armor-clad and graphite layers add sealing flexibility and durability, while a galvanized steel core enhances overall structural integrity. This gasket is engineered specifically for the left-hand side, ensuring proper orientation and pressure distribution across the deck. It’s also compatible with models from 2001 through 2016, including the 2007 Classic editions. Whether you're working on a routine top-end refresh or reinforcing a performance build, this gasket brings race-proven engineering to your everyday diesel workhorse.

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:

• Ensure compatibility with 2001–2016 GM 6.6L Duramax engines (LB7, LLY, LBZ, LMM, LML)
• Designed for left-hand cylinder head orientation
• Features a 4.130" round bore and .062" compressed thickness
• Constructed with five layers of stainless steel for durability
• Reinforced with armor-clad, graphite, and galvanized steel materials for sealing irregular surfaces
• Outer layers coated with high-temperature polymer for enhanced sealing
• No re-torque required after installation, simplifying maintenance
• Suitable for high-performance and high-load applications
• Manufactured to order; allow 2–3 weeks for production and shipping
• Professional installation recommended to ensure proper sealing