true but with induction you need to rev it alot to hear it,but exhaust u here mostly all the time,i had a 1.1 106 with pipercross IK and a full catback powerflow exhaust,it did add more of a kick but i was puttin in 10 pound every night for like 15 delivery's within 2 mile radious,it basicly drank it,so with a powerlow catback and no induction kit with normal driving it shudent be affected?