
HSK66 Heavy-Duty Head Stud Kit for 2001-2016 GM Siverado/Sierra 2500/3500 6.6L
Gator Fasteners HSK66 Features:
If you are wanting to keep your 6.6L Duramax on the road for the long haul, you need to replace your head bolts with upgraded head studs. The Gator Fasteners Head Stud Kit is a must have in any high performance 2001-2016 GM 6.6L Duramax. To overcome head gasket failures that can occur in diesel engines in these high performance applications, Gator Fasteners has introduced heavy-duty head studs for the popular GM LB7, LLY, LBZ, LMM, LML Duramax powerplants. These studs are rated at 220,000 psi tensile strength, and provide the clamping force required to keep cylinder heads from lifting due to higher combustion pressures.
- Replaces Factory Head Bolts
- Chromoly steel 12 point nuts
- 220,000 PSI Tensile Strength
- Steel
- Powdercoat Black
Pressure-Tested Cylinder Head Studs
Gator Fasteners premium-grade 8740 alloy Heavy Duty Head Studs are heat-treated, centerless-ground, and thread rolled to ensure consistent clamping force strength and durability to hold up to the pressure of your 7.3L IDI whether you're building a tow rig, race truck, or just a daily driver.


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