I have remove all of it completely from my BiTurbo. You might want to leave a little bit in there where the gold can part of the muffler meets up with the crome chamber. This will probably prevent the oil from spitting out around the 3 rivets. You will not gain any speed at all from doing this but is much louder. It is by no means loud enough for a ticket. I couldn't even hear my muffler when riding along a '60 Cushman Eagle with a straight pipe. That cushman was LOUD!