caliper upside down?
 

I am mounting 996 calipers on 944 arms. These calipers have different size pistons and I assume that the small piston is leading. Is this correct?

With the bleeder up, the larger piston is now leading. Is this a big deal, or can the bleeders and balance pipe be swapped?

I can't remember off the top of my head if I swapped the rears or not, check on my website as I have used the same parts as you. If the calipers are the wrong way round you will get tapered wear on your pads & decreased brake efficiency.
Rich

Hi

I had the same issue. You can mount them so that they are facing the correct way by swapping the bleed nipples over with the fluid cross feed tube, cunning Italians.

Steve

I did the same with my 993 rear calipers, as on the 911 the rear calipers are mounted on the front of the rear wheel, while my rear 944T set-up on the bug has the calipers behind the rear wheel...
Be carefull removing the bleeds. Use a socket, not a spanner ;)

Hi

On the cross feed tube make sure you use a proper brake line spanner.

Steve

I thought that it would be OK to swap the balance and bleed, but thanks for the confirmation.