08-10 Subaru STI ARP Main Bolts - Block Bolts
08-10 Subaru STI ARP Main Bolts / Block Bolts
ARP Subaru STI EJ257 Main Bolts are crafted from 8740 forged chrome moly and feature generous under-head radius and rolled threads for excellent reliability. The threads are rolled after heat-treating, giving them 1000% longer fatigue life than ordinary bolts. Parallel-ground hardened washers are included. These are crankcase through bolts for all EJ series motors.
Subaru STI 2008-2010