Has any one tried this yet

Well, we have patent pendings on a new muffler and cutout design based on guiding the exhaust flow rather then blocking it and forcing it to find its path of least resistance, aka the butterfly. We hope to have some demos out by the beginning of next year, to see enthusiasts reaction. I will say we can give 100% pure open exhaust or pure, through a quiet muffler flow, aka Johnny Law/neighbor quiet, or anywhere in between, with virtually no flow restriction/ turbulence when open. Obviously when run in quiet mode, the muffler has to have some restriction to quiet the exhaust, but when you need it quiet you probably aren't quite as concerned about flow.

they ain`t big enough!!!!!!!!