STi Shortblock EJ257 (OEM Subaru WRX / STI Replacment Engine)
2008-2014 OEM Subaru STI EJ257 Short Block
This 2.5L EJ257 shortblock that comes as standard issue in the USDM STi will easily swap into nearly any Subaru Impreza WRX or STI with a turbocharged 4 cylinder motor. It is an excellent choice for any Subaru WRX (EJ20) owner looking for an increase in displacement and torque. In its stock form, this block is capable of reliably supporting 465 crank HP and can be easily built to withstand more power. When coupled with the stock Subaru WRX heads, more torque and power will be realized but the the true potential of this EJ257 short block will be unleashed with upgraded cams and valvetrain.