The mufflers and tailpipes I've heard do flow pretty good after the "fix". However, the stock x-pipe is where the real problem is. Replace it with either a h or x pipe with or without converters. If you have emissions laws where you live go with the converts but if not, the off road (no converters) h or x pipe will wake it up (not to mention anyone around you!) You will also need a set of MIL eliminators if you go with the off road piece or you will get the dreaded "Check Engine" light. If you change mufflers you really won't get much more other than a better sound. That's my $.02
