I will be interested also, as I have a 95 db limit (most of the other tracks are 100 db) that I need to meet, my goal is to have a straight pipe and when I need it put the resonator on, so when I cut the pipe I will have the end flared out so it can slip back on and use a v-clamp to hold it on and add a tip if I need to (so I can reach end of car)