I have the Hooker AeroChamber muffler on my 99 with 2.5" pipe done at a local muffler shop with a magnaflow dualwall tip. The note is perfect I can hear my intake over the exhaust note at 3/4 or higher throttle. Nice low growl very close to stock. Muffler can be found cheap on EBAY and is a nice thick shell muffler (helps cut down on interior noise)