For a limited time, we're running a special on our FMF Q4 Exhaust Performance Package and our FMF PowerCore 4 Exhaust Performance Package for the 2008-2015 Yamaha WR250R Dual Sport Bike and Yamaha WR250X Supermoto. Each package comes with an FMF Slip-On Muffler (Q4 or PowerCore 4) and an FMF Header (PowerBomb or MegaBomb). You can optionally add an EJK Electronic Fuel Injection Controller and/or a 12oClockLabs EXUP Emulator.
Our WR250R Project Bike currently has the Q4 Performance Package, while our WR250X Project Bike has the PowerCore4 Performance Package. Both packages really wake these bikes up, giving them better overall performance, especially in the low-end of the powerband, and they make the bike sound so much better than when left stock.
Choose the Q4 package if you're looking for a slightly quieter exhaust system, since the Q4 muffler is the quieter of the two (although still louder than stock).