Subaru 79mm Heat Treated Crankshaft - WRX & STI 2006-2014 (V9+) EJ25 555 A damaged stock arm often

A damaged stock arm often goes unnoticed as the damage can be difficult to spot without disassembling the SCHA and/or checking for proper operation of the internal components through assembly and testing utilizing a windowed transmission case

rims require uncompromised protection provided by Wheel Coat

The OEM hose is prone to expand under high boost

it is possible to increase the output by approximately 108ps and torque by 19Kgm compared to the standard

1x stainless shim (should not be required but supplied in case)

Subaru 79mm Heat Treated Crankshaft - WRX & STI 2006-2014 (V9+) EJ25 555 A damaged stock arm oftenGenuine heat treated Subaru rear thrust crankshaft as found fitted in later EJ25 STI engines.