Definitely better sound and power. Her quad no longer surges at the top end. I had previously installed a Uni pod filter and a fatter main jet, but the stock exhaust was the cork. I still intend to drill out the baffle holes to completely eliminate back pressure (in theory).
The GY6 muffler is a decent buy, because it is a straight pipe with perforations that are wrapped in packing. From the photos, the 200 Beast muffler doesn't look to be as free flowing; I can't speak for the 110 pipes, but they could be modified.
