You can get a dynomax exhaust from Summit for $159.95. It is pretty quiet and replaces the muffler from the axle back. 2 1/4" inlet and dual 2" tailpipes with stainless tips. I have one and I really like it. Only problem is that they welded the stainless exhaust tips on slighly clocked so instead of sitting level I have two ovals on like 5 degree angles to each other. I'm sure if I sent it back Summit/Dynomax would send me a replacement but I needed to pass inspection so on it went. I also have a dynomax cat-back on my 5.0 and it hasn't rusted at all after 2 years of grad school in Binghamton, NY, where they salt the roads beyond belief. Both exhausts sound good and are very quiet.