Merchant 98045060 Grade C Left Side Head Gasket | 2001-2016 GM 2500HD/3500HD 6.6L Duramax

Features:

• Fits GM 6.6L Duramax engines
• Grade C driver side head gasket
• Safe for up to .008" machining
• Compatible with .040 over pistons
• OEM-style fit and performance
• Ideal for rebuilds and repairs
• Maintains proper cylinder sealing
• Durable construction for high-performance use

Left Side Head Gasket for GM 6.6L Duramax

If you're tearing into your 6.6L Duramax build and replacing the head gasket is part of the job, the Merchant Automotive Grade C Left Side Head Gasket is exactly what you want in your corner. Designed specifically for the driver side of 2001–2016 GM 2500HD and 3500HD trucks, this gasket is precision-engineered to handle serious work. Whether you're freshening up a daily driver or buttoning up a high-mileage workhorse, this gasket holds strong where others might fail—especially when you're dealing with higher cylinder pressures from tuning or added performance.

High-Quality Construction

What sets this Grade C gasket apart is its ability to work with blocks machined up to .008"—so if your surface isn't factory fresh but still within spec, you're good to go. It's also safe to use with engines bored up to .040" over, giving you flexibility if your pistons are slightly oversized. Built to OEM standards with the durability and fitment you'd expect from Merchant Automotive, this gasket keeps combustion sealed tight and coolant where it belongs. It's a trusted go-to for builders and diesel shops for a reason—no drama, just solid, dependable sealing.

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