It replaces the EJ257 engines from 2008 to 2014 WRX STI. This engine continues to be absolutely examined and comes along with a 30 Working day start up warranty. The engine has long been compression tested. You should see all the actual engine pictures and the actual compression exam video. https://ej20motor15814.ziblogs.com/29307289/subaru-ej20-engine-for-sale-an-overview