Rear calipers are identical, just a different color. I wouldn't bother unless you're ocd about the color.I have a 401a non-pp. I'm going to purchase the pp1 brembo front kit M-2300-V. Are the non-pp and pp1/pp2 rear brakes the same? If so I'm going to go ahead and pull the trigger but if not what's the part number for the rear brakes?