The KTM RC390 and 390 Duke are entry level bikes that can quickly be transformed into potent race bikes/track day machines. Yoshimura has pumped up the looks and performance on these small, yet fun bikes with our Race Series 3/4 systems in stainless/carbon Mini R-77 muffler options.
When heading to the race track, everything counts, with either muffler option you loose 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!
Proudly made in the USA!
Race series exhaust
* Designed for closed-course competition use only; not for street use
* Meet noise level regulations of most worldwide race sanctioning organizations
* Marked with appropriate EPA noise emissions labels
* Not tested for EPA noise levels
R-77
* Trapezoid-shape muffler
* Maximized internal volume
* Straight, single core baffle
* Low-volume sound insert capable
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Yoshimura 3/4 Race R-77 Slip-On Exhaust for 390 Duke 17-18
$539.00