look-up hagmanmod1,, he has that kit in his 07 rev, says it works well:d
the 07's do work better the 08's have different timing and the knock sensor holds them back but the sensor is also good cause it will save your motor talk to glengine or terra alps they will be able to fill you in and anwser your questions. if your going to ride at low elevation will have to keep compresion stock or close to stock,so it wont make real big power. i ride mine in the hills and its 15/1compresion so it pulls pretty good but then race fuel comes into the picture so talk to the pro's and they will set you up. my kit is a rkt 860 and it does work well ,hope i've helped if you have any Q's pm me if you like07's work a heck of alot better than the 08's