Originally Posted by Koreyy
okay so exhaust is recommended for getting a protune? my goal is just hit 400 whp, if i get exhaust and get protune then would i able hit 400 whp? i heard lot of ppl here not getting exhaust and hit 400whp with meth and i dont really mind with sounding of my car, i satisfied with it now. please advise thanks.
You need more Angry Bird decals to get over 400whp.
But on a serious note, No, you don't need an exhaust for a Protune. A protune with E85 will get you over 400whp easily.