Upgranding SC brakes. . . Questions.
 

Over two years ago I bought some used upgraded rotors and calipers for my SC. Then I had to stop the project to fight cancer. Now I'm back on the SC again.

Here is my dilemma. I have four later model (possibly 928) larger calipers and four rotors to match the calipers.However, I can't remember which go on the front and which go on the rear. Two of the calipers have steel pieces to make them match up to an SC. I am assuming these are probably the fronts. All four are black with PORSCHE lettered in white.

Can someone please give an old fart a clue as to the differences between front and rear?

Thanks.

The ones with bigger pistons go to front.