We machine and modify YOUR 930 rear calipers to fit all standard rear 911 trailing arms.  Just send us your new or used calipers and we will perform the modification.  Price is for 1 pair of rear calipers.
 
All mounting hardware and is included as well as stainless steel braided Teflon brake hoses.
The stainless steel brake lines supplied with the kit are to be used with (2) banjo bolts (Porsche part# 999 135 002 02) that will need to be sourced from Porsche or reused from the original calipers.  This caliper modification to fit a 911 (non 930) will require the use of standard 78-89 930 rear rotors that are a direct fit.  These can be purchased here as well in a drilled configuration (Porsche OEM from Germany).