Product Details
Yoshimura RS-4 Slip-On Exhaust Husqvarna / KTM 350cc-500cc
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. Working in conjunction with factory race teams has allowed Yoshimura to develop a exhaust system that gives you an unparalleled competitive advantage.
Features:
- Pentagonal-shaped sleeve
- Polyresonant front muffler chamber which helps reduce noise
- Two-stage stepped baffle
- Yoshimura Signature Series muffler
- Carbon fiber end-cap
- CARB/EPA tailpipe emissions compliant
- 100% Made in the USA

Product Style | RevZilla Item # | Store Sku | MFR. Product # | Availability |
---|---|---|---|---|
Product Style Yoshimura RS-4 Slip-On Exhaust Husqvarna / KTM 350cc-500cc 2024-2025 | RevZilla Item #10431926 | Store Sku | MFR. Product #265022S320 | AvailabilityOnly 1 Left: Ships within 24 hours |
- Honda
- CRF250L 2017-2020
- CRF250L ABS 2019-2020
- CRF250L Rally 2017-2020
- CRF250L Rally ABS 2019-2020
- CRF300L 2021-2025
- CRF300L ABS 2021-2024
- CRF300L Rally 2021-2025
- CRF300L Rally ABS 2021-2024
- CRF300LS 2023-2025
- CRF450X 2019-2026
- Suzuki
- RMZ450 2018-2026
- Yamaha
- WR450F 2016-2018
- WR450F 2019-2023
- YZ250F 2024-2026
- YZ250F 70th Anniversary Edition 2026
- YZ250F Monster Energy Race Edition 2024-2025
- YZ450F 2014-2017
- YZ450F 2018-2022
- YZ450F Monster Energy Race Edition 2022
- YZ450FX 2016-2017
- YZ450FX 2019-2023
Related Videos
Yoshimura Exhaust Buying Guide
How To Install a Motorcycle Exhaust
Motorcycle Muffler Repacking Explained and Made Simple by Yoshimura R&D