YOSHIMURA RS-4 SIGNATURE EXHAUST SYSTEMS AND SLIP-ON MUFFLERS EXHAUST RS4 SS/SS YZ450F















MFPN:234800D321

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  • Every Yoshimura exhaust product is made by hand to the highest quality standards
  • Championship-winning racetrack experience and Yoshimura's extensive R&D facility ensure these pipes perform
  • This dedication to research and development is only matched by Yoshimura's dedication to uncompromising quality standards
  • True performance art for your motorcycle
  • All Signature series exhaust are tested, documented and marked with appropriate EPA noise emissions labels
  • Do not require changing the motorcycle's emissions control systems
  • CARB and EPA emissions "Replacement Parts"
  • Certified by independent laboratory for EPA noise levels
  • Deliver performance in a slip-on/bolt-on muffler package
  • Do not require changing the motorcycle's emissions control systems
  • Marked with appropriate EPA noise emissions labels
  • CARB and EPA emissions "Replacement Parts"
  • Not tested for EPA noise levels
  • Designed for closed-course competition use only; not for street use
  • Meet noise level regulations of most worldwide race sanctioning organizations
  • Marked with appropriate EPA noise emissions labels
  • Not tested for EPA noise levels
  • An evolution of Yoshimura’s off-road exhaust system
  • Equipped with USFS-approved spark arrestors, forest-friendly noise levels and are tailpipeemissions compliant
  • Marked with appropriate EPA noise emissions labels
  • Not tested for EPA noise levels
  • 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


    • Name Option
    CATEGORY  4-Stroke 
    END CAP STYLE  Cone 
    MADE IN THE U.S.A.  Yes 
    MATERIAL  Aluminum,Stainless Steel 
    MODEL  RS-4 Competition Series 
    SHAPE  Pentagonal 
    SPECIFIC APPLICATION  Yes 
    STYLE  Full System 
    TYPE  Exhaust 


    YOSHIMURA RS-4 SIGNATURE EXHAUST SYSTEMS AND SLIP-ON MUFFLERS EXHAUST RS4 SS/SS YZ450FYOSHIMURA RS-4 SIGNATURE EXHAUST SYSTEMS AND SLIP-ON MUFFLERS EXHAUST RS4 SS/SS YZ450FYOSHIMURA RS-4 SIGNATURE EXHAUST SYSTEMS AND SLIP-ON MUFFLERS EXHAUST RS4 SS/SS YZ450F



    FITMENT
    MAKEMODELYEAR
    YAMAHAYZ450F2013
    YAMAHAYZ450F2012
    YAMAHAYZ450F2011
    YAMAHAYZ450F2010

     

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