The Wilwood Forged Narrow Superlite 4R rear caliper and bracket kit (MPN 140-14026-R) replaces the factory rear calipers on 1997–2013 Corvette C5 and C6 models with a four-piston, radial-mount forged caliper finished in red powder coat. The manufacturer describes the caliper as a forged body with center-bridge reinforcement, and the bracket locates it in the stock position, so the kit upgrades clamping hardware without changing the rear suspension layout. Owners on user forums report that the rear caliper weighs roughly 5 lb, which helps keep unsprung mass reasonable compared with heavier big-brake alternatives.
Fitment is the first thing to verify. The manufacturer states the kit is intended for the 13.00-inch rotors used on 2005–09 C6 Z51 models, so buyers running smaller factory rotors should confirm compatibility before ordering. Minimum wheel diameter is listed at 17 inches. Owners searching for a C5 Z06 rear big brake kit, a 13-inch Z51 rear rotor upgrade, or a red forged 4-piston Corvette rear caliper will find this kit fits those searches. The included bracket mounts to the spindle with a bolt kit, and the manufacturer's assembly sheets call for shimming the caliper to center it over the rotor. Installation uses common hand tools, though brake line fittings and bleeding require care.
The manufacturer states the kit replaces the OE calipers on models updated with 13.00-inch rotors from the 2005–09 C6 Z51 cars, and the kit is listed in a 13.00-inch rotor configuration. Confirm your rear rotor diameter before ordering.
No. The manufacturer notes that OEM rubber brake hoses generally cannot be adapted to Wilwood calipers and sells a flexline kit separately: 220-8177 for C5 and 220-9101 for C6.
The manufacturer lists a minimum wheel diameter of 17 inches for this rear kit.
The manufacturer says most of its bolt-on rear kits can be installed with the common hand tools used for routine brake service. Plan to shim the caliper to center it over the rotor, wrap PTFE tape on the 1/8-27 NPT inlet fitting, and order a flexline kit since OEM rubber hoses generally won't adapt. Follow the torque values and thread-locker instructions in the manufacturer's C5/C6 assembly sheet for the bracket and caliper fasteners. Owners on user forums advise bleeding the calipers before mounting them on the brackets, and to check line routing at the trailing arm clip before final tightening.
