On my 08 6 speed. The simplest way is to add a pedal commander or sprintbooster, that's what I have. All other brothers points are TRUE as well, in terms of RPI scoop, block off plate, BMC, Carbon delete, all those. Cat back system works very well, but it's LOUD. I have Dinan Stage 1, post 2800 rpm you can tell the software makes huge difference in terms of response and pull.
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