Like the Monster Ovals, the Monster Rounds produce that deep and mellow rumble that wins the hearts of many touring riders. Perfect for enjoying your stereo on the highway, Monster Rounds feature blue-proof technology and a CNC-machined billet end-cap for an impeccable appearance. Product Features 4" round muffler bodies Fits CVO models with extended saddlebag skirts Full coverage heat shields For EFI bikes remember the Fuel Management component To complete the exhaust system remember the head pipes