Gator Fasteners Heavy Duty Main Stud Kit – 2001-2005 Chevy/GMC 6.6L LB7/LLY Duramax Diesel (MSK667Y)

Secure your Duramax's rotating assembly under high cylinder pressure with the Gator Fasteners Heavy Duty Main Stud Kit for 2001-2005 Chevrolet and GMC 6.6L LB7 and LLY Duramax diesel trucks. Factory main bearing cap bolts can stretch and lose clamping force as boost, injector output, and cylinder pressure climb — this kit replaces them with reusable, precision-machined studs that keep the main bearing caps clamped tight and the crankshaft properly supported.

• Made from HD220 high-strength material rated to 220,000 PSI tensile strength
• Rolled threads after heat treating for maximum fatigue strength and thread integrity
• Precision machined and heat treated for consistent, repeatable torque values
• Complete kit includes studs, washers, and nuts for all main bearing caps
• Fits: 2001-2005 Chevrolet Silverado 2500/3500 HD and GMC Sierra 2500/3500 HD with the 6.6L LB7 or LLY Duramax diesel engine

Mfg Part #: MSK667Y. Recommended alongside head studs for any LB7/LLY Duramax pushed beyond stock power, towing heavy loads regularly, or being built for performance.