Deliver unmatched reliability with ARP 613-1000 premium stainless steel 12-point bolts, boasting 170,000 psi strength and a corrosion-proof polished finish. The 3/8-16 x 1.000" underhead length design ensures uniform torque and durability—ideal for manifolds, mounts, or high-vibration areas. Upgrade from ordinary hardware for superior results; proudly made in the USA.
