Yoshimura Signature RS-4 Full System Stainless/Al/Carbon - KTM 450 SX-F 2016-2018/450XC-F 2017-2018

Out of stock

YM-264610D320 (Signature Series):

Introducing the brand-new RS-4 Full System from Yoshimura R & D of America.

Yoshimura took the time to develop and test in order to deliver the best exhaust system available for the new KTM and Husqvarna 450, and the results were worth the wait. We took everything we have learned over the last several years with our world famous RS-4 muffler and revised it with the latest materials and an updated spec that makes this new model perform.

The performance gains that were realized on this system are nothing short of amazing. The dyno tells us that this new RS-4 system gained 3 horsepower over the stock system plus increased torque throughout the entire RPM range.

It's time to change the exhaust on your KTM or Husky to Yoshimura

*Please note that there is not a carbon fiber option available for this system.


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

We've kept our Shipping Policy as simple as possible:

  • Non-Rural: $10 North Island and $15 South Island
  • Rural: $10 additional to North and South Island

 All orders are sent as tracked deliveries and you will be provided your tracking number when your order is dispatched. Please allow 3 - 5 days for delivery and up to 7 working days for rural orders.

Any inquiries about your order, please contact us.

Please note;

  • We cannot ship to PO Box addresses.
  • We do not ship to international addresses.


Pick Up is available in store
You can order your products online and pick them up from our store at 72 Barrys Road, Takapuna, Auckland.

Some items are stored at our warehouse, so we will notify you when your order is ready to collect.

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