Review on Enhance Your Yamaha YZF R3 R25 2015-2018 With A High-Performance Slip-On Exhaust System Featuring Muffler by Dan Buycks

Minus one star for sloppy fit at the exhaust clamp (should include a gasket to take up the space) and the funny smell.If you remove the insert at the tip (one screw) this is basically a glass pack. A large open tube down the center with holes in it and sound deadener packed around it. It sounds better than the oem muffler at higher rpms. Just lightly putting around it sounds about the same.