is a rev box worth putting on

[scarface2949]

all my freinds have yfz450s and raptors and other quick quads
is it worth putting on a rev box to get a extra boost will i feel a big diffrence i have a 400ex

[400exstud]

For the mods that you have I would say no. Use that money for something else and you will have better results.

[rooster300ex]

This outta help. if you have piston mods,cam mods things like that it may benefit you.

http://www.exriders.com/vbb/showthread.php?s=&threadid=212609

[jordan_m6]

from some test i have seen the more mods you have the less noticable but for a mild bike you can tell alot

this also depends on the cdi box if you buy a non-programable than you may feel less, but if you buy a 200 programable you can play with it to get it to work best with your setup