is it worth it?

i was looking on ebay and they have tons of aftermarket rev boxes for the raptor 350. is it worth it will i feel the power gain. ???

i dont know if you'll notice the gains but it adds rpms. You wont have to shift as much and its great for getting the holeshots!

Yes and no depending on the box and your setup. If you have motor work done (cam, springs) then its worth it because you will gain the extra 1,000 RPMs. BUT if you do not have any top end work done the box really is pointless and you will just float your valves hela' easy and gain **** for RPMs. An aftermarket CDI really should only be invested in after the motor has mods done to it then you will REALLY notice it. Right now if you have a stock top then the only increase you would really get is a better curve and spark.