OrEo931, on 16 June 2009 - 09:06 PM, said:
Porsche 928GTS calipers (also known as "big blacks")
The part numbers for the front calipers are:
928-351-423-03 (left side)
928-351-424-03 (right side)
36mm/44mm piston sizes
(if you want to use these you will need to swap the bleeder screws & cross-over tubes - very simple)
The 993TT and 928GTS calipers will mount with IPD brackets, and will work with S60R rotors as well. The two calipers look very similar to each other. Depending on what wheel you are running, they might require spacers.
More info...I just got the big black 928GTS calipers and am in the process of installing them on my C70. I removed all the hardware from them to have them PC'd. Did some research to make sure they went back together correctly for use on my Volvo. The reason the bleeder screws and crossover tubes have to be swapped, is that when mounted on the 928, they were
rear aft mounted. To run them on the
front fwd mounted Volvos you have to swap them so that the smaller diameter piston hits first when the rotors are turning forward. If that makes sense. If not, there is also an arrow on the calipers to show you which direction the rotor should be turning. And even tho it's a "duh" I'll mention it anyways, the bleeder screws go on top.
Edited by mune237, 07 May 2010 - 08:02 PM.