Engineered to overcome the limitations of first-generation diesel head retention systems, the Gator Fasteners HD220 Head Stud Kit (HSK69) delivers unmatched reliability for Ford's 6.9L IDI engines.

Unlike competitor kits using standard 8740 chromoly steel (like ARP 150-4069), Gator's proprietary HD220 alloy undergoes specialized heat treatment and manufacturing processes that create superior resistance to head lift under extreme boost pressure.

Every stud begins as a precision-forged blank, heat-treated to achieve optimal hardness before thread rolling.

This advanced manufacturing method preserves the material's structural strength compared to traditional cut-thread designs, ensuring consistent clamp load retention even during repeated high-temperature cycles. The kit includes corrosion-resistant components rated for 220,000 PSI tensile strength - a significant improvement over conventional 8740 formulations.

Designed for Ford's 6.9L diesel workhorses, this kit helps combat common head separation issues in high-mileage engines when properly installed. The 12-point nut design enables precise torque while the enlarged washers help protect engine deck surfaces.

Whether you're upgrading injectors, adding turbos, or preserving a classic diesel, these studs provide the clamping security needed for modern performance demands - when installed according to specifications

• HD220 Dominance - Outperforms ARP 150-4069's 8740 chromoly in tensile strength and torque retention
• Diesel-Specific Engineering - Material formulation optimized for high-compression diesel combustion cycles
• Precision Thread Rolling - Post-heat treatment manufacturing prevents micro-fractures in high-load environments
• Complete Installation System - Includes 12-point nuts and hardened washers complete assembly
• Factory Bolt Replacement Essential - Addresses head gasket failure points in aging 6.9L IDI engines
• Model-Specific Validation - Exact fitment for 1983-1987 Ford trucks with 6.9L diesel configurations