I noticed that newer GS-R's have aluminum instead of cast iron calipers like EF's do. If I were to do the bigger EX/DA front disc could I use the newer GS-R aluminum calipers? They mount on the same size disc IIRC. What about the rear ones? Those also look like they mount on the same diameter rotors even though the e-brake mechanism is a little different on the calipers.

 

I did a search for aluminum GSR calipers and didn't find anything. What years came with them? Rears too?