Rev Box Help

[Jdev3407]

well i just got a new sprocket and chain upgrade and dropped to a 13 tooth in the front sprocket and i was wondering if adding a rev box will open it up a lil more for top end ??? and if so what are some good ones i saw on ebay there was a procom set that came with an upgraded rectifier is that good or no??? any other idea for this snowy winter for my quad

[400exfirebrethr]

well the rev box will give you more rpms but the only way you will gain more top end is if the motor makes power there which the power curve usally drops off around 7500-8500 unless you have a fully built motor.
P.S. the stock cdi rev limiter is 8500 so your choice