Stepped headers - 1-3/4ö to 1-7/8ö designed for maximum performance and more ground clearance Utilizes an advanced inner collector for maximum performance Upswept Super Bike 4" stainless steel muffler body with aluminum end cap and a new removable conical performance baffle delivers a unique aggressive exhaust sound Hand TIG welded Includes 18mm O2 bungs for tuning, 12mm adapters and plugs Full coverage stainless heat shields for the front and rear header pipes included Made in the U.S.A.. EXH 2:1 SUPER FX 06-17 SS