over 300mm st170 front brakes and caliper, and Xr4x4 rear disks? on a Series 1 Rs Turbo?

http://cgi.ebay.co.uk/ws/eBayISAPI.d...MEWA:IT&ih=018

These are my Brakes:




Any info will do....i need to get these alloys of my Rs, came with the car...