Home - Return to Previous Page
Click on image to zoom

Yoshimura RS-4 Signature Series Full System - Aluminum Muffler - 262530D320



Delivers huge power at a very light weight
Offers better handling thanks to a lower centralized mass coefficient
Uniquely-styled pentagonal muffler body with a carbon fiber cone end cap
Front cap design functions as a polyresonant chamber to lower dB output while improving mid- to top-end power
Two-staged, stepped baffle
Tapered headpipe delivers optimal flow and performance
Titanium systems include non-spark-arrested 99 dB motocross insert (unless noted)
Mufflers available with glossy carbon fiber, satin titanium or brushed aluminum sleeve
Stainless systems come with 94 dB insert installed (meets AMA competition requirements), 2 meter Max insert in the box

Product Series

Application List

2019 - 2020HusqvarnaFC350None
2019 - 2020HusqvarnaFC250None
2019 - 2020KTM250 XC-FNone
2019 - 2020KTM250 SX-FNone
2019 - 2020KTM350 XC-FNone
2019 - 2020KTM350 SX-FNone

Shipping Information

  • Item Requires Shipping
  • Free Ground Shipping (1 - 5 Days)