

The work that went into developing the Yoshimura RS4 Exhaust System 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.
Product Style | Item # | Store SKU | Manufacturer Product # | Availability |
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Product Style Stainless Steel/Carbon Fiber | Item # 1219950 | Store SKU | Manufacturer Product # 123400D520 | Availability In Stock: Ships within 24 hours |