Product image 1KAWASAKI KX450F 2019 Signature RS-4 SO SS-AL-CF
Product image 2KAWASAKI KX450F 2019 Signature RS-4 SO SS-AL-CF
Product image 3KAWASAKI KX450F 2019 Signature RS-4 SO SS-AL-CF
Product image 4KAWASAKI KX450F 2019 Signature RS-4 SO SS-AL-CF
Product image 5KAWASAKI KX450F 2019 Signature RS-4 SO SS-AL-CF

*Product may vary by application

KAWASAKI KX450F 2019 Signature RS-4 SO SS-AL-CF

SKU: 244722D320

Regular price $502.09


Signature Series Exhaust System


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2019 marks a new quest for the Kawasaki brand to own the 450cc motocross class. By the looks of it, the new big bore green machine looks like a strong contender, especially when paired with Yoshimura performance.

At Yoshimura, we saw an opportunity to make the new green offering live up to its potential. Power and torque is up across the entire range for both curves with the new KX! Max HP is up an incredible 3% and max torque is up 4.3%. The heart of the power is our RS-4 muffler with its Polyresonant Duplex front chamber and added overall volume helps make the 2019 KX450 come alive.

If you're serious - it's only Yoshimura. Proudly made in the USA!

  • Pentagonal-shaped sleeve
  • Front muffler cap functions as a polyresonant chamber which helps reduce noise
  • Two-stage stepped baffle
  • Carbon fiber end-cap
  • Stainless tail-pipe
  • Repack Kits, optional Inserts and Spark Arresters are available for all models
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.

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  • kawasaki kx450f 2019
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