Wilwood Caliper-DPC56 - Black 1.25in Piston 1.04in DiscDPC56 rear calipers are engineered as a high performance street and custom replacement for Corvettes and hot rods using Corvette suspension. DPC56 calipers add high tech styling and provide the positive response and balanced pad loading provided by a fixed mount, four piston caliper. The DPC56 is a direct bolt on replacement for the OE calipers on all models of the C5 from 1997 to 2004, and all base model C6s from 2005 to 2013 using 12. 00 diameter