scoobydude87

Sorry if this has already been covered and i bet it as just cant find it! just bought an 2004 impreza STI and im hoping to get power up to around 300bhp, thought about a K+N typhoon, and maybe cat back exhaust like the scooby world or scooby clinic system, want it not to be to loud and still pass MOT's cuz iv got sum track day fun planned, any ideas what bhp those might get me? thanks

jd5217

dont forget you will need a remap.

scoobydude87

woz hoping to leave that until i got a few more mods