i have always used a flowmaster "knockoff". half the price, good sound, and a nice little oomph in the seat. nothing crazy, but between an intake mod and exhaust, it helps. check a local shop, preferably a guy who does it on his own. most franchises are limited on what they can do and what brands they sell. also, youtube some videos and see what sound youre looking for. ive had "a**hole" loud and "barely louder than stock with a groan for looks" loud. no matter what, make sure to check out options and listen before you purchase! it sucks spending money and then having to spend more next week!