you're not gonna have much luck finding a quality catback exhaust for under 300 unless u have some mad ass hook ups with an exhaust shop that will do a custom one. Otherwise, i remember recently at speedandstyle.com that they were having a crazy sale on Apexi WS catback for 5th gens and it was something like 399 shipped, which is a smokin deal. For quality catback exhaust systems already made for ur car such as greddy, apexi, etc, 300 is not even the wholesale price, so you're pushing it.