
- Superior Strength: Each stud is manufactured from 8740 chromoly steel and heat-treated to an impressive 200,000 psi tensile strength, providing a significant strength increase over factory bolts.
- Precision Engineering: The studs are centerless ground to achieve perfect concentricity, and their threads are rolled after heat-treatment. This process, known as J-form threading, creates threads that are up to 2000% stronger than those of the competition, which roll threads before heat treatment.
- Corrosion Resistance: A black oxide finish provides excellent protection against rust and corrosion, ensuring the longevity of your main studs.
- Complete Kit: The kit includes all necessary components for a full installation, including the main studs, hardened parallel-ground washers, and high-quality hex nuts.
- Simplified Installation: The use of studs over bolts simplifies engine assembly and allows for more accurate torque readings, as the stud's clamping force is on a single axis without twisting into the block.

Enhance the durability and performance of your 1989-1997 Dodge 5.9L 12V Cummins engine with the ARP 247-5402 Main Stud Kit. This kit is the ultimate upgrade for any engine build, whether you're performing a rebuild or pushing the limits with increased horsepower and torque. Engineered with precision and a focus on strength, these main studs are designed to prevent main cap walk and fretting, protecting your engine block's threads and ensuring long-term reliability under extreme loads.
Superior Strength: Each stud is manufactured from 8740 chromoly steel and heat-treated to an impressive 200,000 psi tensile strength, providing a significant strength increase over factory bolts.
Precision Engineering: The studs are centerless ground to achieve perfect concentricity, and their threads are rolled after heat-treatment. This process, known as J-form threading, creates threads that are up to 2000% stronger than those of the competition, which roll threads before heat treatment.
Corrosion Resistance: A black oxide finish provides excellent protection against rust and corrosion, ensuring the longevity of your main studs.
Complete Kit: [...]
- Superior Strength: Each stud is manufactured from 8740 chromoly steel and heat-treated to an impressive 200,000 psi tensile strength, providing a significant strength increase over factory bolts.
- Precision Engineering: The studs are centerless ground to achieve perfect concentricity, and their threads are rolled after heat-treatment. This process, known as J-form threading, creates threads that are up to 2000% stronger than those of the competition, which roll threads before heat treatment.
- Corrosion Resistance: A black oxide finish provides excellent protection against rust and corrosion, ensuring the longevity of your main studs.
- Complete Kit: The kit includes all necessary components for a full installation, including the main studs, hardened parallel-ground washers, and high-quality hex nuts.
- Simplified Installation: The use of studs over bolts simplifies engine assembly and allows for more accurate torque readings, as the stud's clamping force is on a single axis without twisting into the block.