Click to enlargeCRF250L Yoshimura RS-4<br>Performance Exhaust Package

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Everything you need to unleash the full potential of your Honda CRF250L or CRF250L Rally! Our Yoshimura RS-4 Performance Exhaust Package starts out with Yoshimura's RS-4 Full Exhaust System, which consists of the RS-4 muffler with turn-out end-cap, stainless steel header and mid-pipe, and low-volume insert. You can optionally add an EJK EFI (electronic fuel injection) Controller, which is a plug-n-play device that will help take advantage of your new performance exhaust system and also make your bike run properly. Finally, you can also optionally add a 13 Tooth Front Sprocket and/or a Yoshimura Spark Arrestor Kit.

The Yoshimura RS-4 Muffler is a unique design with predicated power and a quiet earthy exhaust note that speaks volumes for performance. This RS-4 features all the benefits of Yoshi's original RS-4 muffler, but with a unique turned-out end-cap, designed to direct exhaust heat and gases away from the bike's components. To top-it-off, they embossed the Yoshimura "347" logo in the carbon for a clean look. A heat-shield was also added to the poly-resonant chamber to keep rider and passenger legs from exhaust heat. With all its benefits in mind, the RS-4 was an obvious choice for the CRF250L.

  • 2013-2016 Honda CRF250L
  • 2017+ Honda CRF250L and Rally

    Weight Savings:
    CRF250L Stock Muffler w/ Heat Shield: 13.50 lbs
    CRF250L Stock Header w/ Heat Shield: 3.12 lbs
    CRF250L Stock FULL SYSTEM: 16.62 lbs

    CRF250L Yoshimura RS-4 Muffler w/ Heat Shield: 7.80 lbs
    CRF250L Yoshimura RS-4 Header: 1.46 lbs
    CRF250L Yoshimura RS-4 FULL SYSTEM: 9.26 lbs


  • Yoshimura RS-4 Muffler with turned-out end cap
  • Yoshimura Stainless Steel Mid-Pipe
  • Yoshimura Stainless Steel Header
  • Yoshimura Heat Shield (only for 2013-2016 model years)
  • Yoshimura RS-4 Low volume insert
  • All installation hardware
  • Step-by-step instructions
  • Yoshimura Part #123500D521 (2013-2016 CRF250L)
  • Yoshimura Part #123400D520 (2017+ CRF250L / Rally)

    ** OPTIONAL: EJK EFI Controller (adds $225 to package price):
    An EFI (Electronic Fuel Injection) Controller, like the one from EJK, is HIGHLY recommended any time you install an aftermarket exhaust and/or air filter on your fuel injected bike, otherwise you will see little to no performance gains, and the bike may even run poorly.
  • Pre-programmed specifically for a Honda CRF250L with Stage 1 mods
  • Simple install. Plugs into existing wiring using the stock connectors
  • Simple and easy tuning with no dyno required
  • Simple Push Button Adjustment Interface
  • Does not require a computer or software to tune
  • "On-the-fly' tuning. You can make fuel adjustments in your garage or on the side of the road
  • Does Not Interfere with Stock ECU Operation
  • Water-Resistant
  • 2 Year Warranty

    ** OPTIONAL: 13T Front Sprocket (adds $15 to package price):
  • Many CRF250L owners swap out the stock front sprocket for a smaller 13T, so we've added it as an option for our FMF performance package. The sprocket is made from case hardened nickel chrome molybdenum steel. Choose the option below if you want us to include the sprocket as part of the package.

    ** OPTIONAL: Spark Arrestor Kit (adds $35 to package price):
  • Choose this option if you want Yoshimura's USFS Approved Spark Arrestor with your exhaust. Kit Includes Spark Arrestor Insert, End-cap collar, and set screw. Yoshimura Part #SA-13-K.

    In Stock - Usually leaves our warehouse same business day

    NOTE: This item cannot be shipped to California.

    NOTE: To see configured price for the package, choose options below and click "ADD TO CART"...

    CRF250L / Rally Yoshimura RS-4 Performance Exhaust Package
    YOSH-123x00D52xRetail Price: $579.99Our Price: $521.10
    Bike Model Year: 
    EJK EFI Controller: 
    13T Front Sprocket: 
    Spark Arrestor Kit: 

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