Arrow 71820XKI X-Kone Nichrom Slip-On Muffler w/Carbon End Cap for KTM 1290 SuperDuke R 14-19/1290 SuperDuke GT 17-21Arrow X Kone Slip On Exhaust KTM 1290 Super Duke R The Arrow X Kone was originally developed for racing use on the Arrow Competition Exhaust System, now that same race track pedigree is available as a slip on exhaust. The tapper shape of the Arrow X Kone was developed in conjunction with the WSBK Alstare Suzuki Team to be compact, aerodynamic and to perform under race conditions. The muffler sleeve is made from a special blend of nickel and stainless