Two new KTM Six Days models have been announced for 2018. The new Six Days trim can be found on the 2018 KTM 300 XC-W and the 2018 KTM 450 EXC-F. These models carry a list of trick parts to upgrade the bike rather than just a cool graphics kit. 
Begin Press Release:

The special edition 2018 KTM SIX DAYS models celebrate KTM?s offroad racing success with special performance upgrades and top-of-the-line components.
In 2017, the International Six Days Enduro (ISDE) will be held in Brive-la-Gaillarde, France and these two special KTM models have been suitably equipped to handle anything the muddy and rocky terrain can throw at them.
Built on the already impressive XC-W and EXC-F platforms, the KTM 300 XC-W SIX DAYS and 450 EXC-F SIX DAYS are the ultimate iteration of KTM?s Enduro line. Fitted with special touches such as exclusive SIX DAYS graphics and orange frames, the SIX DAYS models look as good as they perform. Performance enhancements include orange anodized CNC-machined triple clamps, front fork preload adjusters, a floating front brake rotor and a solid rear brake rotor to ensure these machines are READY TO RACE. The 2018 KTM 300 XC-W SIX DAYS machine is equipped with the following upgrades:

WP XPLOR front forks fitted with preload adjuster
Machined Orange Anodized Triple Clamps
Handlebar with Six Days Logo
Map Select Switch
Supersprox Stealth 2-Piece Rear Sprocket
Floating Front Brake Disc
Solid Rear Brake Disc
Selle Dalla Valle Wave Factory Racing Seat
Exclusive Ex...