Subaru OEM Nitride-Treated Crankshaft 2006-2014 WRX / 2004-2021 STI / 2005-2009 Legacy GT
This crankshaft from Subaru is their latest and greatest factory EJ crankshaft. The crank is Nitride-Treated to be extremely hard and reduce the chances of wear and damage from foreign material.
This is the OEM Nitride-Treated crankshaft used in the 2017+ STI but it is suitable for most EJ255/257 motors.