Just thought I'd update a little. The new D1SC ProCharger Head unit is on with the same small pulley. NOW I need a complete retune of the car as this head unit creates approximately 5 pounds more boost. With the P1 head unit my car was dyno'd at 643 HP. So we'll see where we are at after all is done. However I may put a bit larger pulley on to keep boost down a little. Have NOT made up my mind for sure yet.
