EJ207 Engine Identification by Stamp Code %100 confirmed   After a few weeks trawling though countless threads covering this topic, on every Subaru forum on the mighty internet (yes I've read them all). I'm not listing sources as there are too many... Everyone says there is no way to tell if an engine (specifically a short block), is a WRX EJ205 or a STI EJ207. Without visually inspecting the pistons,or calling Subaru with a Vin number trying to get matching half block part number