Stepped headers - 1-3/4” to 1-7/8” designed for maximum performance and more ground clearanceUtilizes an advanced inner collector for maximum performanceUpswept Super Bike 4'' stainless steel muffler body with aluminum end cap and a new removable conical performance baffle delivers a unique aggressive exhaust soundHand TIG weldedIncludes 18mm O2 bungs for tuning, 12mm adapters and plugsFull coverage stainless heat shields for the front and rear header pipes includedMade in the U.S.A.