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
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.