Between the head and the reeds, I noticed on my bike a bigger increase in power and crisp throttle response with the VF3 reeds...just swap them with the stock reeds, only mod would be to cut your stock intakes which Vforce explains in the directions.
Not saying the head is bad, I just found in my application the reeds made a bigger difference...if you haven't taken off the TORS yet though, I would do that before either of these mods...