Hi Slow427,
Yes they are Aluminium and they just fit inside my 15" slave wheels with millimeters to spare! My plan is to eventually run 17" wheels.
I got the whole brake upgrade kit from Hoppers Stoppers, which included the new slotted rotors, new hubs (with Ford stud pattern), calipers, brackets, braided hoses etc. From memory the total price was about $1400. I'm sure if you shopped around on e-bay etc. you get get this price down.
http://www.hoppers.com.au/
All the best,
Luke....
