Yoshimura RS-4D Pro Series Full Exhaust System

Item Number: 338945


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Product Description


Yoshimura RS-4D Pro Series Full Exhaust System

Yoshimura's RS-4D full exhaust system is for the rider that demands that most from his machine. This RS-4D exhaust not only increases power and is light, but it also has a lower centralized mass coefficient providing you with a bike that's better handling.

  • Pentagonal-shaped muffler features a carbon fiber cone end cap, two-staged stepped baffle and striking good looks
  • RS-4D front cap design functions as a poly-resonant chamber for a quieter muffler with improved mid to top end power
  • Titanium header and tail pipe
  • AMA Pro Racing sound insert is installed in muffler
  • Kit includes instructions and all required installation hardware

Spec Details
Country of Origin USA
Header Construction Titanium
Muffler End Cap Carbon Fiber
Muffler Sleeve Titanium

Vehicle Fitment

Fitment is guaranteed or your money back plus free return shipping. Don't waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.


  • CRF250R 2011-2012


  • YZ250F 4-Stroke 2007-2013

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