So I hear an 07 CDI unit will help an 06 with better low end performance, etc. I can also buy an aftermarket that claims: -Increases REV limitor up 800 RPMS (at the risk of?) -Adds up to 3 horsepower (?) -More Low end torque (this is really what I'm after) -Wind out each gear longer! (will this damage my valves?) Does anyone here have any experience with changing out their CDI unit?