hey fellers. thinking about going from stock to 4" exhaust. i live in a neighborhood and pretty much know im going to need to have some kind of muffler on whatever exhaust i get. i checked out the page for the Silent Might muffler and read its claims, just wondering if anyone is using it or knows someone using it and whether the results are there. particularly how it claims that it is designed and or tuned by and acoustical engineer and that it also has less resistance than a straight pipe at certain rpm. any input would be appreciated.