ARP Main and Block Bolts Subaru WRX 2002-2014 / STI 2004-2021 / Legacy GT 2005-2009
260-5401
ARP Main and Block Bolts for Subaru WRX 2002-2014 / STI 2004-2021 / Legacy GT 2005-2009 are designed with the utmost precision and attention to detail to meet the high standards of professional engine builders. Made from 8740 chromoly steel and featuring a reduced wrenching head, large underhead radius, and rolled threads, these bolts offer unparalleled reliability. Boasting a rating of 180,000 psi and a fatigue strength 2000% better than most main bolts, they are the top choice for those who demand the best. Each kit also includes hardened parallel-ground washers for added durability. Trust in ARP for the ultimate in performance and longevity for your Subaru EJ20, EJ25, and EJ257 engines.
- 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.
Fitment:
- 2002-2014 Subaru Impreza WRX
- 2004-2021 Subaru Impreza WRX STI
- 1998-2012 Subaru Forester XT
- 2005-2012 Subaru Outback XT
- 1990-2012 Subaru Legacy GT
- 1993-2011 Subaru Impreza
- 2003-2006 Subaru Baja Turbo
- 1994 Subaru Loyale Base
Review pages below for additional information: