ARP Case Bolt Kit 2002-2015 WRX / 2004-2021 STI

The ARP Case Bolt Kit 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 Some engine builders recommend line honing the case to remove any distortion created by the hardware Use OEM SUBARU torque specs and procedures, any other torque specs and lubricants may lead to case distortion damage.