Yoshimura 890 DUKE R 20-21 / 790 DUKE 19-20 AT2 Stainless Slip-On Exhaust, W/ Stainless MufflerYoshimura 890 DUKE R 20 21 790 DUKE 19 20 AT2 Stainless Slip On Exhaust, w Stainless Muffler Introducing Yoshimura AT2 (Alpha Taper 2) muffler! An iconic muffler profile with original design cues. We couldn't think of a better bike to debut our new AT2 than the new KTM 890 Duke R. With its edgy lines, its compact naked bike stance and an all new thrilling torque monster motor, the AT2 is a perfect match. A cousin of the Alpha Taper muffler, AT2 has