Yoshimura KTM/Husqvarna 250/350/450 23-24 RS-12 Stainless Slip-On Exhaust, W/ Aluminum MufflerYoshimura KTM Husqvarna 250 350 450 23 24 RS 12 Stainless Slip On Exhaust, w Aluminum Muffler A performance slip on muffler that provides an edge. That's how we describe our newest slip on offering for the 2023 KTM SX F and Husqvarna FC dirt bikes. Our stainless aluminum Signature Series RS 12 slip on not only provides additional power, but it increases the torque on your SX F or FC. We even took the extra step to include a USFS approved spark