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Yoshimura RS-4 Slip-On Exhaust KTM 250 / 350 / 450 / 500
The Yoshimura RS-4 Slip-On exhaust has been put to the test and has proven its capabilities at the highest level of competition. In 2010 the RS-4 muffler helped Ryan Dungey claim the AMA 450 Supercross and Motocross championships in his rookie season. The Yoshimura-backed GEICO Honda team also took home both East and West Coast Supercross Lites titles in 2012 using the Yoshimura RS-4 exhaust.
Utilizing the same R&D that helped bring success at the national level has resulted in a unique exhaust design that provides an unrivaled combination of power and quiet exhaust note. The Yoshimura RS-4 Pipe features an innovative carbon cone end cap, a two staged stepped baffle, and a polyresonant duplex chamber which acts as a muffler within a muffler to help save weight and centralize mass.
Nearly all Yoshimura exhaust systems that have won Motocross or Supercross championships are members of the Yoshimura Signature Series. All Signature Series pipes have been tested, documented and marked as required by federal and state regulations.
Features:
- Pentagonal-shaped sleeve
- Polyresonant front muffler chamber which helps reduce noise
- Two-stage stepped baffle
- Carbon fiber end-cap
- CARB/EPA tailpipe emissions compliant
- Yoshimura Enduro Series muffler for Enduro models
- Yoshimura Signature Series muffler for MX models
- 100% Made in the USA

Product Style | RevZilla Item # | MFR. Product # | Availability |
---|---|---|---|
Product Style Stainless Steel/Aluminum/Carbon Fiber | RevZilla Item #1015581 | MFR. Product #263502D321 | AvailabilityOnly 2 Left: Requires 1-2 business days of lead time prior to shipment |
This Product Fits
- KTM
- 250 SX-F 2011, 2012, 2013, 2014, 2015
- 350 EXC-F 2012, 2013, 2014, 2015
- 350 SX-F 2011, 2012, 2013, 2014, 2015
- 350 XC-F 2014, 2015
- 450 SX-F 2011, 2012, 2013, 2014, 2015
- 450 SX-F Factory Edition 2012
- 450 XC-F 2013, 2014, 2015
- 450 XC-W 2012, 2013, 2014, 2015
- 500 EXC 2012, 2013, 2014, 2015
- 500 XC-W 2012, 2013, 2014, 2015
This item is also available for 58 different bikes. View All Models
- Honda
- CRF250L 2017-2020
- CRF250L ABS 2019-2020
- CRF250L Rally 2017-2020
- CRF250L Rally ABS 2019-2020
- CRF250R 2010
- CRF250R 2011-2013
- CRF450R 2009-2010
- CRF450R 2011-2012
- CRF450X 2019
- Husqvarna
- FC250 2019-2020
- FC250 2016-2018
- FC350 2019-2020
- FC350 2016-2018
- FC450 2016-2018
- FC450 Rockstar Edition 2018
- FX350 2017-2018
- FX450 2017-2018
- KTM
- 250 EXC-F 2018-2019
- 250 SX-F 2019-2020
- 250 SX-F 2016-2018
- 250 SX-F Factory Edition 2015
- 250 XC-F 2019-2020
- 250 XC-F 2016-2018
- 350 EXC-F 2017-2019
- 350 SX-F 2019-2020
- 350 SX-F 2016-2018
- 350 XC-F 2019-2020
- 350 XC-F 2016-2018
- 450 SX-F 2016-2018
- 500 EXC-F 2017-2018
Yoshimura RS-4 Slip-On Exhaust KTM 250 / 350 / 450 / 500 2011-2015 Resources
Product Description
Part Numbers
Fitment
Resources
51 Customer Reviews
4.5/5
34 Questions & 36 Answers