EXHAUST
EXHAUST SYSTEMS AND SLIP-ON/ BOLT-ON MUFFLERS
QUALITY SINCE 1954
  • Every Yoshimura exhaust product is made by hand to the highest quality standards
  • This dedication to research and development is only matched by Yoshimura’s dedication to uncompromising quality standards
  • True performance art for your motorcycle
  • SIGNATURE SERIES EXHAUST
    RACE SERIES EXHAUST
  • For closed-course competition use only; not intended
  • and marked with appropriate EPA noise
    for street use
    emissions labels
  • Meet noise level regulations of most worldwide race
  • Do not require changing the motorcycle’s emissions
  • sanctioning organizations
    control systems
  • Marked with appropriate EPA noise emissions labels
  • CARB and EPA emissions “Replacement Parts”
  • Not tested for EPA noise levels
  • Certified by independent laboratory for EPA noise levels
  • STREET SERIES EXHAUST
    ENDURO SERIES EXHAUST
  • An evolution of Yoshimura’s off-road exhaust system
  • muffler package
  • Equipped with USFS-approved spark arrestors, forest-
  • Do not require changing the motorcycle’s emissions
  • friendly noise levels and are
    control systems
    tailpipe-emissions compliant
  • Marked with appropriate EPA noise emissions labels
  • CARB and EPA emissions “Replacement Parts”
  • Not tested for EPA noise levels
  • Not tested for EPA noise levels
  • RS-9D DUAL EXHAUST SYSTEMS
    RS-4 EXHAUST SYSTEMS
    AND SLIP-ON MUFFLERS
    AND SLIP-ON MUFFLERS
  • Dual-muffler design exhaust system
  • Delivers huge power at a very light weight
  • Achieves maximum performance, mass centralization, and rider useability
  • Offers better handling thanks to a lower centralized mass coefficient
  • Uniquely-styled pentagonal muffler body with a carbon fiber cone
  • end cap
  • Vertical divider splits the exhaust gases more evenly for smoother flow
  • Front cap design functions as a polyresonant chamber to lower dB
  • to the mufflers for better mid-top power and throttle response
    output while improving mid- to top-end power
  • Parallelogram-shaped muffler bodies increase muffler volume over the
  • Two-staged, stepped baffle
  • Tapered headpipe delivers optimal flow and performance
  • noise levels
  • Titanium systems include non-spark-arrested 99  dB motocross insert
  • Systems and slip-on mufflers meet AMA noise sound regulations right
  • (unless noted)
    out of the box (AMA 2-Meter Max and Amateur 94  dB sound compliant)
  • 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
    RS-4D EXHAUST SYSTEMS
    AND SLIP-ON MUFFLERS
  • Championship-winning exhaust system from Yoshimura
  • throttle control and smoother power delivery
  • Boosts horsepower throughout the power curve, especially at the
  • low- and mid-range rpms where riders and racers need it the most
  • Full titanium header pipe
  • All necessary hardware for installation included
  • To avoid blueing, consider properly tuning the vehicle; however, the vehicle must always remain within the legal standards for emissions controls as
    defined by EPA, CARB and any other applicable state laws.
    DISCLAIMER: NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES.
    SEE PAGE 4 FOR IMPORTANT EMISSION DEFINITIONS AND REGULATORY COMPLIANCE AND WARRANTY INFORMATION.
    2017 PARTS UNLIMITED OFFROAD