When it comes to keeping your 6.6L Duramax diesel engine (LB7, LLY, LBZ, LMM, LML) together under extreme stress, the Gator Fasteners Heavy Duty Head Stud Kit (HSK66) is the ultimate solution.

Designed to withstand high boost, heavy towing, and extreme performance applications, this kit provides superior clamping force to eliminate head gasket failures.

Whether you're running high boost, heavy towing, or aggressive tuning, the Gator Fasteners HSK66 kit is built to handle extreme conditions. Unlike factory head bolts that stretch and fail under high pressure, these heavy-duty head studs ensure maximum reliability for drag racing, sled pulling, off-road performance, and daily driving.

Upgrade to Gator Fasteners Heavy Duty Head Studs and experience the difference in strength, reliability, and performance-because Nothing Bites Like Gator.

• Made from HD220 High-Strength Material - Engineered for extreme durability and high-performance applications.
• 220,000 PSI Tensile Strength - Handles high cylinder pressures and extreme performance conditions.
• Maximum Clamping Force - Reduces the risk of head gasket failures in high-boost applications.
• Rolled Threads After Heat Treating - Increases strength and fatigue resistance for long-term reliability.
• Includes Gator Juice Assembly Lube - Ensures smooth installation and proper torque load.
• Precision Machined & Heat Treated - Ensures exact fitment and superior performance.
• Complete Installation Kit - Includes high-quality washers and nuts for a secure installation.
• Replaces Factory Head Bolts - Perfect upgrade for performance builds and heavy-duty applications.