Yoshimura RS-4 Signature Series Full System Exhaust SS-AL-CF - 231010D320

Item # : 287884

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  • Manufacturer: Yoshimura


Yoshimura YAMAHA YZ250F / YZ250FX/WR250F 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 has paid big dividends in Off-road Racing; winning multiple Supercross and Motocross titles since its inception. We’ve developed the current generation RS-4 based on that R&D, and the result is 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.

  • 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

Installation Instructions & Parts Diagram

Exhaust Signature Series 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: 231010D320