well the rotor hat looks much larger on the 944 than my 951 so i thought i would check. but i am going on just pics. haven't done any parts research yet. was taking the easy way out by asking here.
i am assuming all this really affects is track width since the rotor doesn't appear to move out from the trailing arm at all. so hopefully the caliper mount would be the same. may just have to switch up rotors.
sad part is this guy has axles too, but they are only 19".
attached is a 944 arm pic that i am basing that on...