In actuallity you could say there are FOUR stages but not really. I've heard Terry refer to the stages as each having TWO stages of TUNING. I assume 'tuning' means boost. Thats why there is a range listed for the potential HP instead of just one number, basically. With the stage one you can get the lower number or the higher number based on its level of 'tuning'. All on stock internals. The stage two however requires a bottom end(pistons, rods!!, crank, etc)regardless of the 'tuning' level. Again, this is just the way I perceive the kits to be setup, I may be WAAAAYYY off base. In which case hopefully Terry will correct me.
