Yoshimura has released its Alpha T slip-on and fender eliminator kit for the 2017 KTM Duke/RC 390 for those looking to streamline and shed some weight from their small-displacement motorcycles. 
Begin Press Release:

Introducing 2017 KTM 390 Duke/RC390 Yoshimura exhaust and FE Kit
CHINO, CA (September 14, 2017) – Yoshimura is excited to introduce the Alpha T slip-on for the 2017 KTM 390 Duke/RC390 and Fender Eliminator Kit for the 390 Duke.
Both of these fun machines are a blast to ride, now Yoshimura helps the 390 pack a punch and look even better. Our new Works Finish Alpha T slip on adds the distinctive Yoshimura sound and provides the 390 single cylinder engine 11% peak H.P. and 17% peak torque. Can you say fun" Our famous Fender Eliminator Kit complete with LED light, cleans up the back of the 390 Duke nicely. 2017 KTM 390 Duke Fender Eliminator Kit.
2017 KTM 390 Duke with Street Series Alpha T slip-on.
Proudly made in the U.S.A.

Street Series by Yoshimura –
All Street Series systems are Slip-on/Bolt-on applications do not require tampering with the vehicle’s emissions control system, yet still deliver that special spirit the world has come to expect from the legendary company known as Yoshimura. Street Series applications cover all of the iconic profiles that Yoshimura has become famous for. From the legendary R-77 mufflers, and now the new Alpha T profile, our Street Series exhaust offer street-legal options for almost everything on two wh...