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 head deflection under load. Highly recommended to accompany Billet Main Caps and ARP Main Studs.

These Pro Series kits include 24 studs, 12-point nuts, hardened parallel washers for even load distribution and accurate torque readings, and a packet of ARP Moly Lube.