4x4 sapphs are terrible for fitting big brakes. I have 17x8 TSW Hockenheim wheels on mine but couldn't fit any 4 or 6 pot calipers due to the very low disc offset on the 4x4. In the end I went for a 320x25 mm disc with the standard calipers. Even 330x25 mm discs were too big. On the 2wd it's completely different, there a 330 mm AP kit would fit no problem...