The Subaru EJ257 2.5L flat-4 was made famous by its use in multiple Subaru STI models from 2004-2019. In the Subaru community, the EJ257 has been touted as one of Subaru’s best engines and has a cult-like following. We have written articles about some of the most common Subaru EJ257 Engine Problems, as well as a comparison with the FA20 found in the WRX. More Subaru EJ257 content is on the way as well.