Gator Fasteners HSK66-CS Competition 625 Series Head Stud Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Features:

• Fits 2001–2016 6.6L Duramax engines
• Designed for Silverado and Sierra HD trucks
• Ideal for high horsepower performance builds
• Prevents head gasket failure under high boost
• Extreme duty studs for added strength and longevity
• Will not stretch like factory head bolts
• Increases clamping force and cylinder pressure tolerance
• Supports moderate to fully built Duramax engines
• Improves long-term head gasket sealing
• Perfect for racing and heavy towing applications
• Precision engineered for extreme pressure environments

Lock Down Your Duramax With Confidence You Can Trust

If you're pushing serious power through your Duramax and still relying on factory head bolts, you're gambling with your engine's reliability. The Gator Fasteners HSK66-CS Competition 625 Series Head Stud Kit is built to handle the kind of boost and cylinder pressure that stock hardware simply can't. Designed specifically for 2001–2016 Silverado and Sierra 2500HD and 3500HD models with the 6.6L Duramax, these studs keep your heads planted where they belong, even under extreme loads. Whether you're towing heavy, racing, or just enjoying a high-horsepower street build, this kit gives you the peace of mind that your head gaskets won’t let go. Unlike factory bolts that stretch and fatigue over time, these extreme duty studs maintain consistent clamping force, which is critical when you're pushing well beyond stock limits. It's a smart upgrade for any Duramax owner who takes performance seriously and wants their investment to last. If you're building it right, these studs are non-negotiable.

Engineered To Hold Up Under Maximum Cylinder Pressure

The Gator Fasteners HSK66-CS Competition 625 Series Head Stud Kit is purpose-built for extreme duty use in 6.6L Duramax-powered trucks from 2001 through 2016. Designed for high-performance builds, these studs provide significantly greater tensile strength than factory head bolts and are less susceptible to stretch under high combustion pressures. This upgrade is critical for maintaining head gasket integrity in engines running elevated boost, increased fueling, or heavy towing demands. Each stud is precision machined to exact tolerances, ensuring reliable thread engagement and uniform load distribution across the cylinder head. The result is a more secure and consistent seal that reduces the risk of head gasket failure over time. These studs are ideal for anyone upgrading turbochargers, injectors, or tuning for additional horsepower. Whether you're working on a competition build or a street-driven powerhouse, this kit offers the holding strength needed to support real performance gains. Proper installation with correct torque specs and procedures is essential to maximize the benefit of this upgrade.

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:

• Fits 2001–2016 GM Silverado and Sierra 2500HD/3500HD
• Designed for 6.6L Duramax engines across all sub-models
• Ideal for high horsepower and performance engine builds
• Significantly stronger than factory head bolts
• Engineered to prevent head gasket failure under boost
• Studs are less likely to stretch under extreme pressure
• Best suited for competition, racing, or heavy towing use
• Helps maintain consistent clamping force and seal integrity
• Should be installed using correct torque specs and procedure
• Professional installation recommended for maximum reliability