Vance & Hines V16845 Twin Slash 3" Slip-On Mufflers Chrome for Dyna FXDF/FXDWG 11-15Description for Vance & Hines Chrome Round Twin Slash Slip On Mufflers 16845 Rounds feature large 3 in. muffler bodies with Twin Slash ends; utilizes an all new maintenance free baffle that also minimizes heat discoloration Rounds Monsters are similar to their cousins the Monster Ovals but in a round version that will let riders still hear their stereo while riding Optional baffles for Rounds are available in quiet which reduce sound levels 3 5 dB