not to take away from this mod, but i think some people really under estimate the engineering that went into these cars. yes, the 3 stage manifold swap gets you close but there are clearly other factors to consider, of which are not easy to get around. this thread here addresses one of the issues with the valvetronics:
but Gavin sums it up well when he says:
"without an actually recoding of the ECU to allow for a higher models specs (re VIN and code the DME and Tranny), only so much can be done within a tune itself."