gains are very noticable. the car performs better all through the RMP range. and with 3" the is NO back pressure. I'm still running stock boost so I have a VERY SMALL torge loss (only noticable when dirving 5-10 MPH) 3" is the way to go.MSP FOR LIFE said:GotBoost-how noticable were the gains after installing the exhaust? Oh yeah and is the power loss due to too much back pressure from the 3" piping? Would I be better off goin with a 2.5" setup? I am planning on doing other mods down the road so Im thinking it would be better to get a 3" now but if there is gonna be noticable power losses then I may have to rethink which exhaust im gonna get.