2018-2020 KTM 450SX-F/HUSQ FC450 Signature RS-4 FS

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  • Regular price $1,595.00
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We developed the RS-4 in the R&D lab called the Motocross track. The RS-4 boasts its own resonance chamber and utilizes its volume and a unique baffling system to create the sound and power that is purely Yoshimura.

With 450's it's not all about creating more power, it's about creating more usable power and the RS-4 makes it happen. Max power is increased by 2.3% and max torque is increased by 1.2% throughout the power curve. Grip it and rip it!

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

  • Husqvarna FC450 2019
  • Husqvarna FC450 2020
  • Husqvarna FC450 Factory Edition 2018
  • Husqvarna FC450 Factory Edition 2019
  • Husqvarna FX450 2019
  • Husqvarna FX450 2020
  • KTM 450SX F 2019
  • KTM 450SX F 2020
  • KTM 450SX F FACTORY EDITION 2018
  • KTM 450XC F 2019
  • KTM 450XC F 2020