Upgrade the braking performance and reliability of your 1978–1988 GM G-Body with this complete rear disc brake conversion kit. Designed as a direct bolt-on upgrade for factory rear drum brake vehicles, this kit delivers improved stopping power, better heat dissipation, and a modern performance appearance. Whether you're restoring a classic G-Body, building a street machine, or adding confidence to your daily driver, this kit provides everything needed for a clean and dependable rear disc brake conversion.
Featuring zinc-coated drilled and slotted 11" rotors, this kit offers superior cooling, corrosion resistance, and consistent braking performance. The rotors are triple-drilled to accommodate 5x4.75" (5x120.65mm) and 5x5" (5x127mm) and 5x4.5" wheel bolt patterns, making them ideal for a variety of wheel combinations.
Heavy-duty silver zinc-coated steel caliper brackets provide exceptional durability while maintaining a clean, professional appearance. Included GM-style single-piston parking brake calipers feature an integrated mechanical parking brake, allowing you to retain full emergency brake functionality without sacrificing braking performance.
This complete conversion kit also includes stainless steel braided brake hoses and all required mounting hardware for a straightforward bolt-on installation—no welding or fabrication required.
Fits 1978–1988 GM G-Body vehicles equipped with factory rear drum brakes, including:
*May also fit other GM rear axle applications utilizing the same axle flange dimensions.
Requires 15" or larger wheels for proper rotor and caliper clearance.
Upgrade your classic G-Body with modern rear disc braking performance while maintaining parking brake functionality. This complete bolt-on conversion is an excellent choice for restorations, pro-touring builds, street performance cars, and LS-swapped G-Body projects.
