Don't know about the rears but i saw this set up using the original 8 x 15 Ronals for the front with specially made brackets with zimmerman discs.You need 986 (Brembo) Boxster 2.5/2.7 calipers part # 986 351 421/2: I have seen this mod on a Ur and handled them, they are very light and just right for the UR as the ur quattros weight is within the scope of the 986 caliper can handle. A good upgrade and look awesome! When your done we need pictures.
