【Be Applicable】Pipe diameter should bigger than muffler diameter (Please check the size to confirm that this item fits your motorcycle before bidding). 【Specification】Color: Black; Length: 140mm/5.5"; Outlet Diameter: 60mm/2.36"; Inlet Diameter: 23mm/0.91". 【Materical】100% brand new and high quality,made of Metal Iron,safe and reliable. 【InstalL】Easy to instalL; Adjustable & Removable. 【Advantage】Can effectively reduce deep noise sound, also reduce noise.