230-4201

ARP 12mm 6.6L Duramax Head Stud Kit. 01-16 Chevy / GMC

ARP's Pro Series Head Studs are made with heat-treated and thread-rolled 8740 material with an incredible 200,000 PSI tensile strength rating for better load distribution. They also come with ARP's unique 12-point nuts and hardened parallel washers, giving you the improved torque reading.

230-4202

Chevy Duramax 6.6L CA625+ Head Stud Kit

With ARP's proprietary Custom Age 625+® material, rated at an amazing 260,00 psi tensile strength, you get a material engineered to provide the best clamping force, reduce cylinder head lifting, and peace of mind knowing you have head studs that won't give out on you. Addtionally, they are created with a broached end, allowing for quick and easy installation or removal in tight spaces.

Kit includes:

• Chrome moly steel 12-point steel nuts
• Parallel-ground washers
• Centerless-ground head studs