Yoshimura RS-4 Offroad Race Series Non-CARB Compliant Slip-On Exhaust System

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.

• Stainless steel header and tail pipe
• Pentagonal shaped sleeve
• Front muffler cap functions as a polyresonant chamber which helps reduce noise
• Laser cut heat shield on polyresonant chamber
• Two stage stepped baffle
• Turn out carbon fiber end cap

Note: This product is not CARB (California Air Resource Board) Compliant

Note: Image for reference only. Actual product may vary according to vehicle.