Twin Motorcycles 2 inch Buell Muffler only. Fit's only 1999 and later Tube Frame Buell's.
Only Fit's on STOCK OEM 2 inch BUELL HEADER and our 2 inch header with a 2 inch collector for Buell S1, S3, M2, X1.
Look here for the 2 inch OEM HEADER
Twin Motorcycles Buell Support forever