  ** OUT OF STOCK - This product is no longer in stock at our warehouse. As of spring 2024, FMF has discontinued their mufflers and header pipes for the 2008-2020 Yamaha WR250R/X. Yoshimura is about the last company making an exhaust system for the Yamaha WR250R. See our Yamaha WR250R Performance Guide for all the details on what you need to get your WR250R/X running properly and increase power, torque and overall ride-ability. Home > Dual Sport > Yamaha WR250X/R Parts > FMF Q4 Performance Package This FMF Q4 Performance Package allows you to choose your own performance exhaust components based on your needs. The package is based around the FMF Q4 Hex Slip-On muffler. Additional options for the package include an EFI (electronic fuel injection) Controller, which is a plug-n-play device that will help take advantage of your new performance exhaust system. Finally you can also choose to add an EXUP Emulator and AIS removal kit to the package (details below). Fitment: 2008-2021 Yamaha WR250R / WR250X Sound: The FMF Q4 Muffler is the quietest aftermarket muffler available for the Yamaha WR250R. It is still louder than stock, but quieter than other aftermarket mufflers. If you want a quiet exhaust on your WRR, this is the one. Header Recommendations: Due to customer requests, we have changed our FMF packages to no longer include an FMF header pipe, and instead you can order one separately (see links below) or use your stock header pipe with the FMF muffler. That being said, we do however still recommend the FMF header over the bikes stock header.... it is slightly larger in size, and does feature FMF's PowerBulge technology... plus, it just looks much much cooler. We've been running FMF MegaBomb headers on our bikes, and that is our header pipe of choice. It is also the most popular header we sell for these bikes. Here are the headers that FMF offers for the WR250R/X... Weight Savings: WR250R/X Stock Muffler w/ Heat Shield: 9.89 lbs WR250R/X Stock Header w/ Heat Shield: 1.98 lbs WR250R/X Stock EXUP motor and cables: 1.48 lbs WR250R/X Stock FULL SYSTEM: 13.35 lbs WR250R/X FMF Q4 Muffler: 5.68 lbs WR250R/X FMF MegaBomb Header: 1.51 lbs WR250R/X FMF Q4/Megabomb FULL SYSTEM: 7.19 lbs TOTAL WEIGHT SAVINGS: 6.16 lbs PACKAGE INCLUDES THE FOLLOWING... One (1) WR250R WR250X FMF Q4 Hex Slip-On Muffler: OPTIONAL PARTS THAT CAN BE ADDED TO THE PACKAGE INCLUDE... ** OPTIONAL: EFI Controller (adds to package price): An EFI (Electronic Fuel Injection) Controller 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. At this time, we offer three different EFI options, the EJK EFI Controller, JD Jetting EFI Controller, or the Dynojet PowerCommander V. Details below. Each are simple to install and plug into existing wiring using stock connectors. ** OPTIONAL: EXUP Servo Emulator (adds to package price): ** OPTIONAL: AIS Block Off Kit (adds $20 to package price): Sound Demo Video: Older Video Reviews: |
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