Ok so i went to my local menike(i know thats not how you spell it) and i was seeing how much exhaust would run me he said about 375-450 depending on what i get. does this sound right? it was also with one of there "high performance" mufflers. the guy was clearly more into the sound it makes not how much power i would get. so what should i do? i also heard a few times that pacesetter isnt good is that true?