We've been sellling performance parts for the Yamaha WR250R/X for several years now and have learned what our customers want in a performance exhaust package to improve the bikes performance and make it run better. With this Performance Exhaust Bundle, we've combined several of the most popular performance products for the Yamaha WR250R and WR250X into a handy package deal. The package is based around the FMF Q4 Hex Slip-On muffler, which has been our best selling muffler for this bike over the years. Many customers choose to use their stock header pipe with the muffler, so this package does not include a header pipe and you will re-use your stock header. The package also includes 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 we've included the EXUP Emulator and AIS removal kit to finish out 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.
Constructed from aircraft grade aluminum and high strength stainless steel
Removable USFS spark arrestor included
Pounds lighter than stock
Twin stage core design for lower sound output and extended life of packing material
Includes mid pipe insert if you want to use with the smaller stock header pipe
Max Sound output 96dB; most models below 93dB
One (1) EFI Controller:
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 two different EFI options, the EJK EFI Controller and the Dynojet PowerCommander V. Details below. Each are simple to install and plug into existing wiring using stock connectors.
Choose which EFI Controller you want from the dropdown before adding to your cart
One (1) 12oClockLabs EXUP Servo Emulator:
When you remove the OEM Yamaha WR250R/X exhaust, you will also be removing the EXUP cables and motor that are attached to the exhaust. This is a simple task, and involves un-plugging the EXUP Servo motor. 12oClockLabs offers an EXUP Servo Emulator which plugs right in so you're bikes computer won't realize you've removed anything and you won't get a light on your dash. This part is highly recommended anytime you remove the OEM exhaust.
One (1) Graves Motorsports AIS Block Off Kit:
When installing an aftermarket exhaust on your WR250R/X, the AIS (Air Induction System) is no longer serving any purpose and will cause backfiring/popping on deceleration. Once you remove the AIS from the bike, this kit can be used to block off the port/hose on the bike.
Sound Demo Video:
IN STOCK - Usually leaves our warehouse in 1-2 business days
NOTE: This item cannot be shipped to California, Alaska, Hawaii or Canada.
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