Looking to swap ATR Pitbull 3" MINT

[BKLYN2FLORIDA]

I just bought a MINT almost new ATR Pitbull Muffler 3" off the net. I was planning on doing a custom single shot exhaust. People are saying the drone will be rediculous, so now im thinking of doing (2) ATR 2.5" pitbulls,
anyone out there have a set to trade for my 3" and of course some $$.
thanks

Unless theres a trick to reduce the drone....Anyone????