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This product is legal in California only for racing vehicles which may never be used, registered or licensed for use upon a highway.

Yoshimura RS-4 Exhaust System

The work that went into developing the Yoshimura RS-4 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.

Features:

  • Pentagonal-shaped sleeve
  • Polyresonant front muffler chamber which helps reduce noise
  • Two-stage stepped baffle
  • Carbon fiber end-cap
  • Stainless Steel or Titanium Head pipe
  • CARB/EPA tailpipe emissions compliant
  • 100% Made in the USA
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This Product Fits:


Honda
CRF250L 2017-2020
CRF250L ABS 2019-2020
CRF250L Rally 2017-2020
CRF250L Rally ABS 2019-2020
CRF300L 2021-2023
CRF300L ABS 2021-2023
CRF300L Rally 2021-2023
CRF300L Rally ABS 2021-2023
CRF300LS 2023
CRF450X 2019-2024
Kawasaki
KX250F 2017-2020
Suzuki
DR-Z400S 2000-2024
DR-Z400SM 2004-2024
Yamaha
WR450F 2012-2015
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