YOSHIMURA RS-4 OFF-ROAD FULL SYSTEM EXHAUST 14-17 YZ450F RS4-COMP FS SS/AL/CF-TIP
Fast Shipping! Directly from our central warehouse in Alberta, Ontario, and Quebec
All Signature series exhaust are tested, documented and marked with appropriate EPA noise emissions labels
Delivers huge power at a very light weight
Offers better handling thanks to a lower centralized mass coefficient
Uniquely-styled pentagonal muffler body with a carbon fiber cone end cap
Front cap design functions as a polyresonant chamber to lower dB output while improving mid- to top-end power
Two-staged, stepped baffle
Tapered headpipe delivers optimal flow and performance
Stainless systems come with 94 dB insert installed (meets AMA competition requirements), 2 meter Max insert in the box
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.
Features:
- Pentagonal-shaped sleeve
- Front muffler cap functions as a polyresonant chamber which helps reduce noise
- Two-stage stepped baffle
- Series: Signature
- Muffler Type: RS-4
- Header/Muffler/End Cap TYPE: SS/AL/CF