When heading to the race track, everything counts, with either muffler option you lose half the weight of the stock system and gain 2.5% max H.P. and 3.3% max ft. lbs. of torque. Styling and sound are all Yoshimura with our classic R-77 profile muffler. We've made the performance, now its time for you to realize the power!
This system removes the Catalytic Converter!
https://www.yoshimura-rd.com/collections/all/KTM-390-DUKE-2017 Take a listen to the 2017 KTM 390 Duke with the Yoshimura Works Finish Alpha T slip on. This Street Series slip-on also fits the 2017 KTM RC390. No insert installed, but is included with the slip-on.