The GP series exhaust which add power and a more race-inspired sound to your bike as well as lowering the overall weight Special S design make your bike more attractive Sounds really great; Meet many buyers’favor; Have a try and you will not disappoint It Is Universal Muffler Can Be Used For Street Bike, Scooter, Quad And Any Other Bike With Pipe Diameter 38-51 mm Manufacturer warranty for 90 days from date of purchase Specification: Material: 304 Stainless Steel With Perfect Joinning.Pipe Length: 380MM.Inlet Dia: 51MM . Fitment: It Is Universal Muffler Can Be Used For Dirt Bike Street Bike Scooter Atv Quad And Any Other Bike With Pipediameter 38-51MM. Package Includes: 1 * Muffler And Hardware As Pictures. Motorcycle Slip on Exhaust System With Moveable DB Killer For Dirt Bike Street Bike Scooter ATV Racing Stainless Steel Welding Adaptor Allow to Fit Pipe 38MM-51MM. With Removable DB-Killer, Easy to Adjust Sound. Sounds Really