70 355 w/x-pipe 2 1/2in Pypes system w/ there race pro mufflers. After reading reviews on there mufflers everyone said that the race pros was the quitest. If it is, you would be arrested with the others. The drone is so bad at cruse 55-65mph that you have to scream at the person beside you and a sound system is useless. My question is, what is a good sounding muffler at idle and crusing? It's quiter with the windows open vs closed w/ac on.