The Silent Rider is an auxiliary muffler that when attached to your stock/OEM exhaust system quiets the popping noise of your ATV/UTV's stock muffler alone. It is easy to install and remove, giving you the flexibility to stalk your target in stealth, or have fun being loud. The Silent Rider is designed for 4-stroke gasoline engines only. Not for use with diesel engines. The Silent Rider does not reduce power or performance. -Message seller for vehicles used above 6,000 feet altitude- Compatible with: Rhino 450 (06-09) Rhino 660 (04-07) Bennche Bighorn 400, 500, 700/700 Crew Cub Cadet Challenger 700 Coleman Outfitter 500, 700, 700L Crew Hisun 500, 700 (not Sector or Axis models) Massimo MSU-500(10-14), MSU-700 QLink FrontRunner 500 QLink FrontRunner 700/700XL Supermach 500, 700 UV-D004 UTV 500 UV-P012 UTV 700 bolt-on adapter required and included with the silencer kit. This silencer uses a bolt-on adapter. The tailpipe on the stock muffler is not the proper size and therefore an adapter is necessary. Simply remove the bolts at your exhaust opening and replace the exhaust tip with The Silent Rider bolt on adapter. The adapter stays attached to your factory muffler and acts as the tailpipe. The adapter will not damage the engine or affect the flow of the exhaust. The Silent Rider will pressure fit onto the adapter. Once the sturdy mounting brackets are properly secured, the installation is complete!