Here's a performance website that has reviewed a number of performance mufflers that are on the market. <a href="http://racetruck.tripod.com/muffler.html" target="_blank">http://racetruck.tripod.com/muffler.html</a> Notice that little 'old' Aero does NOT make the list Aero NOT gettin her done Where's the beef??? <!--Beg_Sig-->