At this point in time buying the highly regarded Akrapovic open or race system is not an option in the US, it was removed from the KTM North America webstore sometime recent. So if you want the highest performance exhaust now its the Tyga WSS 300 or buy the Akrapovic with the cat 90805999100 and add the open link pipe 90805908000 but this has an MSRP of $1094.98 making it a little silly. Sorry for the bad news today gents!