Grade C Right Head Gasket

Features:

• Designed for passenger (right) side
• Grade C thickness for precision sealing
• Safe for blocks machined up to .008"
• Compatible with .040 overbore pistons
• OEM-style construction for reliable performance
• Ideal for stock or performance builds
• Durable materials withstand high cylinder pressures
• Maintains combustion and coolant integrity
• Perfect for rebuilds and head gasket repairs

Premium Right Side Cylinder Head Gasket for GM Duramax

If you're diving into a top-end rebuild or replacing a blown head gasket on your Duramax, the Merchant Grade C Right Side Head Gasket is the kind of part you want to reach for. Designed specifically for the passenger side of 2001–2016 GM 2500HD/3500HD trucks with the 6.6L Duramax, this gasket brings factory-level precision with the strength and reliability that diesel engines demand. Whether you’re refreshing a high-mileage workhorse or pushing more power through your build, this gasket helps ensure you’ve got a solid seal between the cylinder head and block where it matters most.

Durable Construction & Design

Built to handle a bit more than stock, this Grade C gasket is safe for use on blocks machined up to .008" and can support pistons up to .040" overbore, making it a great option for mildly modified or cleaned-up performance engines. It’s crafted with the same multilayer steel construction you’d expect from an OEM-grade gasket, so it stands up well to high cylinder pressures and fluctuating temps, especially important if you're towing, hauling, or running upgraded tuning. If you’re chasing reliability and want to make sure your build holds up to the kind of abuse a Duramax is known for taking, this gasket is a smart move.

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