Quote Originally Posted by Mechie3 View Post
07 WRX to be specific. Wide intercooler, airpump, dog leg fuse box, and windshield washer tank in the fender make it 06/07. The large wiring harness over by the passenger strut tower makes it an 07. With some expensive camber plates too.
Just to add..What make it NOT an STI...

Plastic intercooler - as STIs had an all aluminum one. ('02-'05 2.0 WRXs did also)
Raw 'silver' intake manifold - STIs had red painted intake manifolds.

Yes, aftermarket blowoff valve.