Did this along time ago added a splitter pipe out the back. You'll actually be able to hear the exhaust some afterwards. It has less drone at idle and you can hear the lope. Its hard to judge exceptable volume because everyones is different, but this isn't **** off the neighbors loud. Other than WOT volume is about the same. Big thing is muffler is about 15lbs so you get weight reduction and slightly less backpressure at wot. win/win