100% brand new.Stainless steel welded adapter allows installation of pipes from 38 mm to 51 mm in diameter.It is a universal muffler that can be used on dirt bikes, street bikes, scooters, ATV quads and any other motorcycle.Packing list:1 x Exhaust Pipe.6 x Shift Gear Sleeve1 x Adapter.1 x Clamp and 1 x Rubber.2 x Spring and hook1 x Fixing screwSpecification:Color: black/silver/half blueMaterial: Stainless SteelLength: 370 mm (12.2 in) Width: 105 mm (4.1 in) Diameter: 51 mm (2 in)Connection diameter: 51 mm (2 in)We have a welded bracket for mounting tubes with 38-51MM outlets.Caution:Loud: remove mufflerLOW SOUND: Install mufflerInstallation Instructions1. Remove the exhaust pipe. Insert transmission pipe.2. Install spring hooks on both sides to secure.3. Install exhaust pipe bracket protector4. Remove the screws securing the exhaust pipe bracket.