The Macan caliper is the same as the Q5, Touareg and Q7 use a 6 pot caliper. There are two versions of the Macan of the Macan brakes 345x30mm and Macan S 350x34mm, for the 345mm version no modification is needed. Just bolt the caliper to the hub and use S4/S5 disc. For 350mm version you will need new steering knuckles. The Touareg/Q7 caliper will bolt to the standard knuckle buy you wont find a disc, the offset is wrong so you will need a custom disc.