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

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


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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. 


  • 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.

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