1978-88 G-Body Brakes
Build around larger disc brakes with systems for 1978-88 GM G-Body applications. Choose from 13-inch front conversions with 2-inch drop spindles and dual-piston calipers, rear disc brake kits, BlackOut components, and stainless brake hoses for a more complete front-to-rear setup.
Big Brake and Drop-Spindle Options for G-Body Builds
This collection is unusually focused: nearly everything on the page centers on moving the G-Body toward larger disc brakes rather than servicing the original braking system.
Up front, 13-inch drilled and slotted rotors, dual-piston aluminum calipers, and 2-inch drop spindles combine braking and stance in the same package. Different caliper finishes change the look, but the core setup still focuses on fitting a larger brake system into a lowered front end.
The rear follows a different formula. Dedicated G-Body conversions use 11-inch or 11.25-inch rotors and are built around the factory or compatible GM rear-end configuration, with BlackOut options extending the same darker finish to the back of the car.
Because these are larger wheel-end changes rather than small replacement parts, wheel clearance becomes a defining limit of the build. The front must accommodate both the 13-inch brake package and drop spindle, while the rear conversion must match the axle and parking-brake arrangement already under the car.
FAQ
Which vehicles are considered GM G-Body applications for these brake parts?
POL identifies G-Body applications including vehicles such as the Chevy Malibu, El Camino, Monte Carlo, Buick Grand National, and Oldsmobile Cutlass within its related G-Body products. Fitment still varies by individual product, so always verify the exact year and model against the selected brake kit before ordering.
What front disc brake conversions are available for 1978-88 G-Body cars?
The collection focuses on 13-inch front systems using drilled and slotted rotors, dual-piston aluminum calipers, and 2-inch drop spindles. POL offers configurations with raw, polished, black, and red aluminum calipers, along with a dedicated 1978-88 G-Body drop-spindle conversion.
Will the 13-inch front brake conversion lower my G-Body?
The front systems listed in this collection use 2-inch drop spindles, so ride height needs to be considered as part of the conversion. If maintaining the current front stance is important, do not assume these packages function like a stock-height brake conversion. Review the exact kit and the rest of the suspension before ordering.
What should I check for wheel clearance with a 13-inch G-Body brake kit?
Check more than wheel diameter. A 13-inch rotor and dual-piston caliper package needs adequate space inside the wheel, so diameter, inner-barrel clearance, offset, backspacing, and spoke profile can all matter. Verify wheel fitment against the exact conversion before purchasing wheels or brake components.
Can I convert the rear of my 1978-88 G-Body to disc brakes?
Yes. POL offers an 11-inch rear disc conversion designed for factory GM G-Body rear ends. Options include powder-coated calipers, drilled and slotted rotors, and stainless hoses. A separate BlackOut rear disc system with 11.25-inch rotors is also represented in the collection.
Do I need different emergency brake cables after installing rear disc brakes?
Parking-brake compatibility should be checked whenever the rear brakes are converted. POL carries a dedicated 1978-88 GM G-Body emergency brake cable set for rear disc brake conversions. Check the selected rear kit and the existing parking-brake arrangement to determine what additional components are required.
What should I check before ordering a G-Body disc brake conversion?
Confirm the exact vehicle and year, current spindles, desired front ride height, rear-end configuration, front and rear brake setup, wheel diameter and clearance, master cylinder, proportioning system, brake hoses, and parking-brake arrangement. For the front kits in this collection, pay particular attention to the 13-inch rotor package and 2-inch drop spindles because both affect how the system fits with the rest of the car.