Wilwood 140-17121-D Forged Dynalite Rear Brake Kit with Black 4-Piston Calipers for 1978-1988 GM G-Body

Upgrade the rear braking performance of your 1978-1988 GM G-Body with the Wilwood 140-17121-D Forged Dynalite brake kit. Designed for street performance, restoration, and custom applications, this complete rear brake system combines lightweight aluminum construction with dependable stopping power and a clean black powder-coated finish. The kit includes four-piston Forged Dynalite calipers and drilled and slotted iron rotors engineered to provide responsive braking and effective heat management.
The Wilwood Forged Dynalite calipers are manufactured from aluminum to help reduce unsprung weight while maintaining the rigidity needed for consistent pedal feel. Their compact design is well suited to GM G-Body chassis applications, while the black powder coat delivers a durable finish that complements a wide range of builds. The included rear rotors feature a 12.19-inch diameter and drilled and slotted surfaces to support cooling and help maintain friction performance during repeated braking.
This Wilwood rear brake kit is developed specifically for 1978-1988 GM G-Body vehicles and is intended as a coordinated braking upgrade rather than a collection of mismatched components. Verify wheel, axle, parking brake, and vehicle-specific clearance requirements before installation to ensure compatibility with your configuration. Professional installation is recommended, along with proper system bleeding and bedding procedures after installation. The Wilwood 140-17121-D kit offers a practical combination of reduced weight, upgraded braking hardware, and a refined appearance for performance-focused GM G-Body projects.

Features:

• Brand: Wilwood

• Part Number: 140-17121-D

• Application: Rear brake system for 1978-1988 GM G-Body vehicles

• Caliper Type: Forged Dynalite four-piston calipers

• Caliper Material: Lightweight aluminum

• Finish: Durable black powder coat

• Rotor Type: Drilled and slotted iron rotors

• Rotor Diameter: 12.19 inches

• Product Type: Complete rear brake kit

• Installation Note: Verify vehicle, wheel, axle, parking brake, and clearance compatibility before installation