These Pro series studs from ARP are cold-forged to ensure molecular integrity. They are heat-treated prior to thread rolling and machining, and are rated at a whopping 190,000 psi. They are a must for any engine project approaching 1000 horsepower at the crank, and will add life to any high powered engine assembled with them by reducing crank deflection under load. Highly recommended to accompany Billet Main Caps and ARP Head Studs.

These Pro series kits include 12 studs, 12-point nuts, hardened parallel washers for even load distribution and accurate torque readings, a set of ARP main cap side bolts, and a packet of ARP Moly Lube.