- Manufacturer: Yoshimura
Yoshimura KTM 450 SX-F / XC-F Signature RS-4 FS SS-AL-CF
Stainless Steel Header / Aluminum Muffler / Carbon Fiber End-Cap
The work that went into developing the RS-4 muffler design paid big dividends in 2010 with Ryan Dungey winning the AMA 450 Supercross and Motocross Championship series as a rookie in the same year, and again in 2012 with the Yoshimura-backed GEICO Honda team winning both 250 Supercross Lites titles. That same R&D has been directed to developing the current generation RS-4 a unique design that provides an unrivaled combination of power and a quiet exhaust note. The RS-4 features a Polyresonant duplex chamber, a two-staged stepped baffle and an innovative carbon cone end cap.
*Full System is only compatible with Fuel Injected models.
- Pentagonal-shaped sleeve
- Front muffler cap functions as a polyresonant chamber which helps reduce noise
- Two-stage stepped baffle
- Carbon fiber end-cap
- Stainless steel header and tail-pipe
Introducing Signature Series by Yoshimura - an offering of exhaust systems that can be installed with confidence. Signature Series lineup is the answer for today's challenging marketplace. The applications for the Signature Series line cover the entire powersports spectrum, including many of off-road applications. Everyone of Yoshimura's Championship Winning Motocross exhaust systems and nearly all of out ATV/Side-by-Side applications are all members of the Signature Series Family. All Signature Series components are tested, documented, and marked as required by federal and state regulations.
Manufacturer Part Number: 264600D320