Over Rev Box

[NRPkfx400]

I was wondering if these were a good add on for the money and if i would need to rejet to use one of these.

[kfxracer]

The only good ones are the dyna fs ones... the procom and re-badged procoms (all ebay, white brothers, etc.) are hit or miss boxes. Some work fne, some burn out quickly. I got the dyna fs non-programmable on because I didnt know a whole lot bout programming them, and I love it. The extra rpm's were nice, and there was a bit of a boost in the power, felt like it pulled harder! No, you dont have to rejet! Just unbolt and unplug the stocker, bolt this one on and plug it up! Easy as pie!!!