[Dreamer99]

The new setup will have piston area f/r balance almost the same as stock

OEM w/60mm front, 46mm rear pistons = 2827mm2 (f) / 1661mm2 (r) - f/r balance 0.588
Lambo/new porsche setup = 5677 mm2 (f) / 3215 mm2 (r) - f/r balance 0.566

The new f/r balance noted above isn't much of a change with the Brembo calipers. I read on the stoptech website that their BBK moves the braking bias slightly to the rear (compared to stock).