Vance & Hines Monster Oval 5-1/2&Prime, Slip Ons Chrome with Chrome Tips 16755 5-1/2in. Monster Ovals crush the old saying that more power requires more noise The ovalized mufflers give Monster Ovals twice the internal volume of other slip-on mufflers for better flow and more power Stereo-friendly, Monster Mufflers yield a deep rich tone thats perfect for those cross-country tours Encased in full-coverage one-piece formed heat shields with machined end caps in chrome or black, riders will be proud to show off their pipes wherever the road takes them Sold in pairs