The non-programmable DP part is 'tuned' to work with the other components of the kit. Without those parts you won't likely realize the full benefit of the ecu. The pc3 is programmable, cell by cell, to match your bike's configuration. You shouldn't need them both although having the pc3 while NOT having the rest of the DP kit you could get a custom mapping done to maximize what you've got. That'll cost you a good $250-350 though. Best of luck and let us know how it all works out.