??Material??Aluminum & Stainless Steel??the body made of aluminum with stainless steel connector,removable DB killer, offers difference sound effect. ??Specification??Overall Length: 365mm,Connection: 51mm Slip-on type ??Applicable models??Universal fits for street/sport motorcycles and Scooters with 38-51mm diameter exhaust pipes. ??Good Sound??Sounds deep sound??little throaty and not terrible loud. ??Satisfaction Guarantee??100% refund if not satisfied. We always stand behind our high quality Products & Services, please do not hesitate to contact us if you have any unsatisfied experience on our product, we will provide friendly, easy-to-reach support for you. This is a 100% brand new??Easy to Install??Removable DB killer ??Universal fits 38-51mm diameter Exhaust Muffler. Condition:100% brand new. Color??Painted in carbon fiber color Material: Aluminum & Stainless Steel,stainless Steel Welding connector. Length??365mm??Connection inlet Dia: 51mm .Exhaust Muffler With Movable DB Killer. Package Includes: Includes mounting clamp and a 38-51mm adaptor Installation Instruction NOT Included