A performance slip-on muffler that provides an edge. That&';s how we describe our newest slip-on offering for the 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 arrestor in every slip-on, giving you peace of mind when you&';re headed out to the wilderness. With the SA-19-K spark arrestor, your bike will be noticeably quieter, and when you&';re out in the deep, everyone can appreciate less dB&';s. Want to remove the sparky and head to an MX track? No problem! Pull out the PTF insert system that makes it a breeze to install and remove spark arrestor or low volume insert. Just like all Yoshimura mufflers the RS-12 needs to be serviced from time to time so if you need to repack or rebuild it we have all the components to provide your RS-12 long life. Weight: RS-12 stainless/aluminum muffler w/spark arrestor: 7.6 lbs. VS Stock muffler: 6.1 lbs. SA-19-K Spark arrestor is included and installed. RS-12 is proudly designed, developed and made in the USA.