I could really give a **** about NA not interested in a slow car. My feeling is start at or near the top of the model line and go from there.

Why mention an E55? Because it has a lot in common with the SRT6 engine. Do you really want me to mention names of people that have installed the parts? Not sure what good that will do but I can if you insist.

Why bring up other cars? When you make statements that an upgraded TB will not provide gains without reprogramming the ECU I figured I would point out that plenty of people have the types of parts you are discussing installed and seeing good gains. Not completely apples to apples as one car actually puts out some HP but you get the idea.