I had one it was quiet had a silencer on the end maybe 1 or 2 MPH improvement.
But it would not work on this new gazbike motor anyone advertises racing motor only Don't bother with it trash it get regular stock.
I had to go back to a stock exhaust remove the end cap prevent it from chugging small inclines it's loud as hell but at least now it climbs hills.
I'm waiting to break it into 800 miles then I'll try put the banana back on see it works.