Our brand-new offering for the 2026 Yamaha YZ-450F is ready for action. Introducing the RS-12 Signature Series Slip-On-lightweight, compact, and built to deliver serious power. This RS-12 is USFS approved and comes equipped with a spark arrestor installed, so you&&';;re ready to ride the woods or trials right out of the box. Featuring a stainless steel mid-pipe paired with an aluminum muffler and finished with a matte carbon fiber end cap, every detail is built for performance and durability. Proudly engineered, developed, and built in Chino, CA.-Yoshimura quality you can count on.