The Wilwood DPC56 (part 120-13916-RD) is a four-piston, fixed-mount rear caliper in red powder coat. The manufacturer engineers it as a high performance street and custom replacement for Corvettes and hot rods using Corvette suspension. Wilwood says the design is based on the top performing DynaPro low profile caliper series. The fixed four-piston layout offers the positive response and balanced pad loading that drivers look for in a track-minded rear upgrade. Its 1.25-inch stainless pistons give it a total piston area of 2.46 square inches, which is the main reason to choose it over a cheaper bolt-on unit.
Per the manufacturer's kit documentation, the caliper bolts directly to the rear spindle of C5 or C6 models from 1997-2013, without the need for additional brackets or adapters. The manufacturer also notes that the caliper has been checked to clear Z06 model wheels, while other wheels still need a clearance check. For bleeding, begin with the caliper farthest from the master cylinder, and use Wilwood Hi-Temp 570 grade fluid or higher, with EXP 600 Plus as the recommended racing fluid. Keyword focus: DPC56 rear caliper, Corvette C5 C6 big brake upgrade, 12-inch rear rotor fitment, red four-piston caliper.
The manufacturer states that the DPC56 kit has been checked to clear Z06 model wheels. Other OE and aftermarket wheels should be checked for clearance, and wheel spacers may be required on some applications.
The manufacturer lists the 1997–2004 C5 and the 2005–2013 base C6 models using the 12.00-inch diameter rear rotor.
The manufacturer recommends Wilwood Hi-Temp 570 or EXP 600 Plus racing brake fluid. Its installation literature warns that DOT 5 silicone fluid is not recommended for racing or performance driving.
This is a bolt-on job with no drilling, since the caliper mounts directly to the spindle. Installation tools were not confirmed during research, so check the manufacturer's install sheet before starting. Bleeding is the main gotcha. Owners on user forums report that bleeding the rear calipers while they remain bolted in place can leave an air pocket, so some removed the caliper and angled it to purge air. Owners also mention that the rear kits include extra washers to address bolt length. Bleed the farthest caliper first and check for leaks once the system is bled.
