Yoshimura RS-4 Signature Series Full Exhaust System

Yoshimura Signature Series exhaust components are the answer for riders faced with ever-tightening noise and emissions regulations at the federal level. All Signature Series components are independently tested, documented, and marked as required by state and federal regulations as CARB/EPA-compliant.

The work that went into developing the RS-4 muffler design paid big dividends during development in AMA Pro Racing. That research was directed at developing the RS-4’s unique design that provides an unrivaled combination of power and a quiet exhaust note. The RS-4 muffler 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

CNC mandrel-bend header and tail pipe

Includes instructions and all required installation hardware

80dB EPA noise emissions compliant

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