At DMG Motorsports, we present the Yoshimura RS-4 Exhaust Repack Kit (SKU 961-9051) — the genuine, OE-spec service kit riders need to keep their RS-4 muffler performing like the day it was installed. Over time, the packing material inside any performance muffler breaks down and becomes saturated with carbon and exhaust residue, and Dirty packing restricts airflow from your motor, which results in a loss of power and degradation of sound. This complete Yoshimura repack kit gives you everything needed to refresh your muffler at home, restoring the crisp throttle response and signature Yoshimura sound your exhaust was designed to deliver. Whether you're a weekend trail rider or a dedicated racer, staying on top of your repack schedule protects your investment and keeps your bike sounding — and running — right.

Features:

• Genuine Yoshimura RS-4 Exhaust Repack Kit, SKU 961-9051 / UPC 0840025909137
• Silent Sport Premium Packing Material included for a complete, correct-volume repack
• Includes 8x stainless steel rivets (C3-RIVET) for a secure, corrosion-resistant rebuild
• Includes 2x rivet bands (LC4.5T) to properly seat the end cap
• Includes RS-4 end-cap decal (RS4-NB002) to finish the job with an OE look
• Recommended repack interval: every 6-8 hours of off-road use, or after each race, to maintain peak performance
• Restores lost horsepower and improves exhaust tone by replacing worn, carbon-clogged packing with fresh material
• Designed by Yoshimura specifically for RS-4 muffler systems for a correct, reliable fit

Fitment