This is a genuine Subaru EJ257 2.5 litre shortblock. This shortblock is standard equipment on the 2006+ Australian STi. The 2.5 litre block makes a great upgrade for all WRX models, since there is no replacement for displacement. The Australian STi block features a semi-closed deck for increased strength. This motor is physically a bolt-in for all WRX and STi models (WRXs will require ECU tuning, bigger injectors, etc.).
We can supply and install this short motor in house exactly to your requirements. Whether you are replacing or upgrading we have packages available at competitive prices, just ask us today.
1. THIS IS NOT A COMPLETE MOTOR: This is a fully assembled bottom end, which consists of a block, crank, rods and pistons only. You will need to reuse your stock cylinder heads or purchase replacements.
2. The OEM 2.0L WRX heads will bolt-on for to the 2.5L short block, but there will be a change in compression.
3. For high-powered applications, we recommend replacing the cast OEM pistons in this block with a more capable forged variety, please ask us for a quote to match your needs.