Tailgunner® GUNSHIP models are an easy, direct-fit, installation for all Harley-Davidson touring bikes (baggers.} Everything is included for you to perform a quick, effortless installation and easy to follow directions are included. We also offer custom, universal fit models for everything else. Just determine if there is 4″ diameter of clearance where the mufflers will mount on the bike and what the outside diameter size the exhaust pipe is where the muffler slips on. All universal models include a support bracket on the backside of each model. Tailgunner® universal fit models are a simple installation on many bikes. With others a certain amount of modification, such as a support bracket and inlet adapter. This is an expected and enjoyable part of custom motorcycle building. Tailgunners® are mounted on everything from stock Harley-Davidsons to metric cruisers and sport bikes and will slip-fit onto most after-market exhaust systems as well.