Click to enlargeKLX250 FMF Q4 Performance<br>Exhaust Package

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Home > Dual Sport > Kawasaki KLX250 Parts > FMF Q4 Exhaust Pkg

We've combined several of the most popular FMF products for the Kawasaki KLX250 into a handy package deal. The package is based around the FMF Q4 Hex Slip-On muffler. You can either use your stock header pipe with the Q4 muffler, or optionally add to the package one of FMF's header pipes... either the PowerBomb or MegaBomb. 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.

Sound: The FMF Q4 Muffler is the quietest aftermarket muffler available for the Kawasaki KLX250. It is still louder than stock, but quieter than other aftermarket mufflers. If you want a quiet exhaust on your KLX, this is the one to get!

Fitment: 2018+ Kawasaki KLX250 / KLX250 Camo


One (1) KLX250 FMF Q4 Hex Slip-On Muffler:
  • 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
  • Part #042363

    ** OPTIONAL: Use stock header pipe, or add an FMF PowerBomb or MegaBomb Header (adds to package price):
  • Stainless Steel Construction
  • Ideal for use with FMF Q4 Muffler
  • PowerBomb available with optional stainless steel FMF Heat Shield
  • PowerBomb header makes better LOW to MID-RANGE power
  • MegaBomb header makes power across the entire powerband (LOW, MID, and TOP-END power)
  • PowerBomb: Part #042155
  • MegaBomb: Part #042251

    ** OPTIONAL: 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 the Kawasaki KLX250 with Stage 1 mods (aftermarket exhaust system)
  • Simple install. Plugs into existing wiring using the stock connectors
  • Unlike most other fuel-injection programmers, this one is load-sensitive
  • Additional tuning can be done and no laptop or software is required
  • EJK Part #9310209

    ** OUT OF STOCK - This item is currently on backorder. Check back for availability.

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

    KLX250 FMF Q4 Performance Exhaust Package
    KLX250-FMF-Q4Retail Price: $379.99Our Price: $309.95
    Muffler/Mid Pipe: 
    EFI Controller: 

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