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Product image 1HONDA CRF450R/RX 2017-19 Signature RS-9T FS SS-SS-CF
Product image 2HONDA CRF450R/RX 2017-19 Signature RS-9T FS SS-SS-CF
Product image 3HONDA CRF450R/RX 2017-19 Signature RS-9T FS SS-SS-CF
Product image 4HONDA CRF450R/RX 2017-19 Signature RS-9T FS SS-SS-CF
Product image 5HONDA CRF450R/RX 2017-19 Signature RS-9T FS SS-SS-CF

*Product may vary by application

HONDA CRF450R/RX 2017-19 Signature RS-9T FS SS-SS-CF

SKU: 225840R520

Regular price $947.36

MADE IN USA

Signature Series Exhaust System


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Emissions Compliance Declaration: QUALIFIED MANUFACTURER DECLARED "REPLACEMENT PART"


WARNING: Cancer and Reproductive harm - www.p65warnings.ca.gov


The 2017 CRF450R's new engine and muffler configuration gave us the opportunity to create an entirely new system built specifically for the new CRF450 machines. Introducing our all-new Signature Series RS-9T tapered dual muffler exhaust system for the all new CRF450R.

Yoshimura has been working tirelessly on development with American Honda HRC's engineers to achieve maximum performance and mass centralization, to optimize rider usability. Yoshimura achieved all this by moving the new RS-9T mufflers forward in order to tuck in under the side number plates. Working with HRC race engineers and the all-new 449cc Unicam engine and its unique downdraft fuel injection system, Yoshimura was able to deliver an exhaust that provides more tractable power and improved torque.

    Some features on the new RS-9T dual tapered muffler CRF450R/RX system include:
  • Dyno and track tested by Honda R&D in Japan, American Honda MX Team, and HRC All Japan MX Racing Team
  • 3-stage header provides broader overall range of power and throttle response
  • New tail pipe divider creates smoother exhaust flow and better velocity to the right and left tail pipe
  • New compact forward positioned RS-9T dual muffler design provides lower center of gravity for better mass centralization
  • Larger RS-9T core creates improved throttle response, and power in mid and top end
  • New RS-9T mufflers have more volume than stock to provide a decrease in overall dB noise level
  • Works with or without Honda's new optional electric start system
  • Stainless Steel Header and Tail-pipe
Instructions and Parts Diagram
Instructions / Parts Diagram

Signature Series Exhaust System

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Introducing Signature Series by Yoshimura - an offering of exhaust systems that a dealer can install with confidence. Our Signature Series lineup is the answer for today's dealer who is faced with a challenging marketplace. The applications for the Signature Series line cover the entire powersports spectrum, including many of our off-road applications. Everyone of our Championship Winning Motocross exhaust systems and nearly all of out ATV/Side-by-Side applications are all members of the Signature Series Family. All Signature Series components are tested, documented, and marked as required by federal and state regulations.

Vehicle Fitment

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  • Honda CRF450R 2017
  • Honda CRF450R 2018
  • Honda CRF450R 2019
  • Honda CRF450RX 2017
  • Honda CRF450RX 2018
  • Honda CRF450RX 2019
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