they are the same thing right? but i have a couple of questions about the rev boxes. i have been looking at two different ones- a big gun one and a procom one. they are suppost to increase the rpms by 1000-1250. with this rpm gain do i have to worry about blowing the motor or would i be fine? also what are the speed increases and would i have to regear? the mods that i have are hmf full system with 175 main jet, no air box lid, and i run both 20' and 22' rear tires depending on what i am doing. the 22's most of the time? dont know if that would effect anything. thanks