Gator Fasteners Heavy Duty Main Stud Kit 03-07 Ram 5.9L Cummins

Build a stronger foundation for your 5.9L Common Rail Cummins with the Gator Fasteners HD220 Heavy-Duty Main Stud Kit. Designed for engines that retain the factory block girdle, this kit upgrades the main bearing cap fastening system to help maintain secure clamping force under high cylinder loads and in demanding operating conditions. Whether you're assembling a high-horsepower build, preparing a truck for heavy towing, or improving bottom-end reliability during an engine rebuild, these heavy-duty main studs help resist main cap movement and support long-term engine durability. Manufactured from Gator Fasteners' proprietary HD220 alloy, the main studs deliver over 220,000 PSI tensile strength, providing increased strength and fatigue resistance compared with conventional 8740 chromoly hardware. The kit includes 14 heavy-duty 10mm bolts to secure the factory block girdle, along with shorter 12mm main stud nuts engineered to provide the clearance required for the original stiffener. A black oxide finish helps protect against corrosion, while precision-machined components support proper fit and dependable clamping performance. This complete fastening solution is built for the demands of performance, towing, and daily-driven Cummins applications.