This OEM Crankshaft has been designed, refined, and manufactured to produce reliable power in late model STI 2.5L engines. It has proven reliable in all manner of standard and high-power race engines. 

Crankshaft features:

Genuine Subaru Quality

Nitrided Hardening for Reliability

79mm Stroke

52mm Big end journals

Crankshaft to suit:

EJ255/EJ257

All EJ25x engines with 52mm Big end journals

EJ20 2.15L stroker engines when matched with a stroker piston set.

To see more information about selecting the right engine size for your application, click here. 

Engine build information:

This crankshaft must be fitted with new engine bearings set with adequate clearances for the application.

It must be fitted to a clean engine free from any debris

The bearings and crankshaft should be lubricated and primed prior to compression and first start.