Wilwood Dynapro Radial Rear Brake Kit For OE Parking Brake DPR-DS,12.19", Drilled, Red

The Wilwood Dynapro Radial Rear Brake Kit (Part #140-8754-DR) is made for 2004 and newer Pontiac GTO rear axles that use the original parking brake. This kit delivers improved rear braking by using forged billet four-piston callipers and 12.19-inch vented rotors. The design provides a balanced rear brake bias with factory master cylinder output, and the included shims ensure precise calliper alignment. The callipers and rotors are engineered to handle the added stress from more aggressive street or track use. The kit also helps with pad life and heat dissipation, thanks to vented rotors and a proven calliper mounting system. It retains the full function of the OE parking brake, making it both practical and performance-focused. The kit requires only minor modifications for installation and is a technical step up from stock brakes without changing the parking brake setup.

KEY SPECIFICATIONS

- Rotor Diameter: 12.19" vented (optional drilled/slotted)
- Rotor Thickness: 0.81"
- Bolt Pattern: 5 x 4.75"
- Caliper: Wilwood DynaPro 4-piston (red or black)
- Parking Brake: Uses OE parking brake
- Kit Includes: Calipers, brackets, rotors, pads, shims, hardware
- Hose/Fittings: Not included (check Wilwood kit P/N 220-8755)
- Caliper Inlet: 1/8-27 NPT

INSTALLATION DETAILS

This brake kit requires the services of an experienced installer. To fit the kit:
- Remove the original rear brake parts from the GTO.
- Trim each rear axle dust shield to a 9.25” diameter for bracket and rotor clearance.
- Attach calliper brackets with the factory bolts and Loctite. Use the supplied shims for proper alignment.
- Mount rotors and secure callipers with the included washers and lock nuts. Centre the callipers with the shimming system.
- Use high-quality steel adapter fittings and stainless braided lines for calliper connections, as factory hoses usually do not fit the new callipers.
- Follow the kit instructions for brake bleeding and bedding in the new pads and rotors.
- Complete all safety and pedal feel checks before operating the vehicle.

FACTORY FIT NOTES

- Cutting the dust shield for fitment
- Matching the bolt pattern to the vehicle hub
- Verifying wheel clearance for the calliper and rotor size
- Providing your own brake hoses and parking brake cables, as these are not included
- Checking spindle, bracket, and hardware compatibility before installation
Some installations may require custom brake line brackets, and the installer is responsible for ensuring the safe and correct fitting.