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Gator Head Stud Kit Grade C Head Gaskets For 2001-2016 GM 6.6L Duramax Diesel
SKU:
HSK66 | 12637785 | 12637788
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- $744.99
- $744.99
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This 3-piece performance bundle includes the Gator Fasteners HSK66 Heavy Duty Head Stud Kit and a pair of OEM GM Grade C Cylinder Head Gaskets (12637785 & 12637788)—a complete solution for top-end durability and performance on your 2001–2016 GM 6.6L Duramax engine. Whether you’re towing, racing, or tuned for high boost, this combo is built to handle extreme stress and prevent head gasket failure.
Gator’s HD220 alloy studs provide a 220,000 PSI tensile strength, ensuring maximum clamping force and resistance to head lift. The GM Grade C gaskets match OE fit and finish with 1.05mm thickness for optimal sealing under high combustion pressure. Perfect for LB7, LLY, LBZ, LMM, and LML engines, this setup provides the sealing reliability you need on or off the road.
Features:
- HD220 head studs rated at 220,000 PSI tensile strength
- Includes OEM GM Grade C head gaskets (Left & Right)
- Black oxide coated studs resist rust and corrosion
- Rolled threads post-heat treatment for fatigue resistance
- Gator Juice lube ensures proper torque application
- Direct bolt-on replacement for stock head bolts and gaskets
- Gaskets are OE-grade, 1.05mm Grade C thickness
Specifications:
- Stud Material: HD220 high-strength alloy steel
- Gasket Grade: GM Grade C – 1.05mm compressed thickness
- Gasket Part Numbers: 12637785 (L), 12637788 (R)
- Finish: Black oxide corrosion-resistant coating
- Tensile Strength: 220,000 PSI
- Thread Type: Rolled after heat treatment
Included:
- (36) Heavy Duty Head Studs
- (36) Hardened Parallel-Ground Washers
- (36) 12-Point High-Strength Nuts
- (8) Head Bolts
- (1) Bottle of Gator Juice Assembly Lube
- (1) OEM GM Head Gasket – Left Side (12637785)
- (1) OEM GM Head Gasket – Right Side (12637788)
Fitment:
- 2001–2016 Chevy/GMC Silverado/Sierra 2500/3500 6.6L Duramax (LB7/LLY/LBZ/LMM/LML)
Notes:
- 5 Year Limited Warranty
- Follow included torque specs and sequence for install
Product Specs
SKU:
HSK66 | 12637785 | 12637788
Brand:
Gator Fasteners
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