I went with a FMF slipon because I didn't have the money for a full exhaust and knew I could later get the powerbomb header. After Installing the slipon I noticed I needed an EFI and so I got that. It made a BIG difference. I saved a couple bucks and now a powerbomb header will be deliver tomorrow. If you have the money I would suggest you get the EHS big 3 kit and if not go the route I went.
Renthal 13t sprocket, FMF powercore + Powerbomb header,PCV, UNI, Pro Armor Fat Peg nerf bars & Skid, PRM Baja Front bumper, AC 6-pack rack, Renthal Handle bars, 6K Xenons, Kenda Kutters XC, Acerbis Uniko, ODI Grips