C5C6 Z51 Brake Upgrade Question





I recently purchased a set of C6 Z51 Calipers, Brackets, and rotors to replace my base C5 equipment. I am missing the piston from the right rear C6 Z51 caliper and I was wondering if it is a carry-over part from the C5 base. Just curious before I go and spend $75 on a new piston. I am under the impression that the front pistons are the same because the stainless steel pistons that DRM sells are advertised to work with C5 base and C6 Z51.
Thanks for your help!
-James


