I understand the whole brake balance discussion and to an extent I agree. By lowering the rear more there is less transfer of weight to the front and thus more weight and traction can be kept on the rear tires, effectively being able to brake more with the rear....maybe.
I have the ride height set at (by memory) 4.25" front and 4.4" rear...

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'06 Cayman S -JIC Cross, Quaife, CCW C14 wheels,MPSC's, Milltek cat back, GT3 seats Schroth harnesses, TC design bar, Pagid yellows, GT3 cup brake ducts,de-snorked, vanilla air freshener