ARP Case Bolts are forged from very durable materials and make for a perfect option when rebuilding an engine to hold big power. Details: • Forged from premium INCONEL 718 • All bolts undergo a generous under-head radius and heat treating for reliability • Threads are rolled after heat treating to make them 1000% stronger than most other main bolts • Bolts are rated at 200,000 psi • Application specific • Includes parallel-ground, hardened washers Don't settle for anything less than the best!