No....the stock impreza exhaust isn't made for a turbo system for one. And my friend's brother owns a 2007 impreza and tried to put a WRX catback on his base model car. He said the thing was off by about 4 inches.
378awhp/373wtq Custom Dom 3 & CBRD tuned 2006 STI.
"When in doubt...flat out" - Colin McRae