The best power brake conversion kit depends on your vehicle and existing brake setup. The JEGS kit is designed for several GM A-, F-, and X-body cars with front disc and rear drum brakes; the PartsFlow kits target Chevy C/K pickups and Jeep CJ models. A universal booster kit offers adjustability but may need brake-line modifications. Confirm the vehicle, brake layout, and included components before choosing.
| Kit | Best For | Key Detail |
|---|---|---|
| JEGS GM A/F/X-Body Kit | Listed classic GM cars | Manual-to-power conversion; front disc/rear drum |
| Universal 8-Inch Booster Kit | Custom or listed Ford truck projects | Adjustable proportioning valve; line changes may be needed |
| Auto City Classic Kit | 1968–1972 Chevelle front brakes | Front disc conversion with 11-inch booster |
| PartsFlow Chevy Pickup Kit | 1967–1972 Chevy C10, C20, C30 | Booster, master cylinder, valve, lines, brackets, and pedal |
| PartsFlow Jeep CJ Kit | 1974–1986 Jeep CJ5 and CJ7 | Listed for disc/drum or drum/drum setups |
JEGS GM A/F/X-Body Power Brake Kit
This kit converts a manual brake system to power-assisted braking and is designed for a front-disc, rear-drum setup. Its listed applications include several GM A-, F-, and X-body models, such as 1967–1969 Camaro and Firebird, Nova, and selected Chevelle, GTO, Cutlass, Skylark, and related cars.
Best for: Owners of a listed classic GM car who want a vehicle-specific power-assist conversion for disc/drum brakes. It was selected for its clearly stated body-family and brake-layout applications. Limitation: The listed design is for front disc and rear drum brakes, so do not assume it suits another configuration. Verify the exact model and year before ordering.
Universal 8-Inch Dual Power Brake Booster Kit
This kit pairs an 8-inch dual power brake booster with a 1-inch-bore master cylinder and includes an adjustable proportioning valve. The valve allows rear brake pressure to be increased or decreased. The product listing describes it for Ford trucks from 1957–1972 with disc/drum brakes and says it accepts 3/16-inch brake lines and dual-bowl master cylinders.
Best for: A buyer working on a compatible Ford truck or a custom project who needs adjustable rear brake pressure. The adjustment feature makes it distinct from the vehicle-specific kits here. Limitation: It is not a direct factory replacement and may require brake-line modifications. Check mounting and vehicle fitment rather than treating “universal” as a guarantee of bolt-in installation.
Auto City Classic Chevelle Front Disc Kit
This kit is listed for 1968–1972 Chevelle models and includes drilled and slotted rotors. Its stated specifications also mention an 11-inch booster and stock ride height. The product title identifies it as a front disc brake conversion kit, which is a different emphasis from a standalone manual-to-power booster conversion.
Best for: Chevelle owners seeking a front disc-brake conversion and considering a kit whose listed details include a booster. It is included because brake-system changes and power assistance may be part of the same restoration plan. Limitation: The provided details do not specify the full contents or clarify whether it converts an existing manual system to power brakes. Confirm those points and the exact vehicle fitment before purchase.
PartsFlow 1967–1972 Chevy Pickup Conversion Kit
This complete kit is listed for 1967–1972 Chevrolet C10, C20, and C30 pickups. It includes an 8-inch dual-diaphragm booster, master cylinder, proportioning valve, brake lines, mounting brackets, and pedal assembly. The product description says the booster is intended to provide more brake assist and a smoother pedal feel compared with a manual setup.
Best for: Chevy pickup owners who want a broad component package for a conversion, repair, or restoration. Its listed brackets and pedal assembly may reduce the need to source those items separately. Limitation: The listing advises verifying the truck year, model, and brake setup; do not assume every configuration within those model names uses the same parts.
PartsFlow Jeep CJ5 And CJ7 Booster Kit
This 8-inch dual power brake booster kit is listed for 1974–1986 Jeep CJ5 and CJ7 models. The stated application covers disc/drum or drum/drum brake setups, making it the broadest stated brake-layout range among the vehicle-specific kits in this list.
Best for: CJ owners looking for a model-specific booster conversion kit and whose vehicle falls within the listed years and brake arrangements. Limitation: The supplied details identify a booster kit but do not enumerate every included component. Check the package contents and confirm the vehicle’s actual brake configuration before ordering.
Buying Guide: How To Choose A Power Brake Conversion Kit
Does the kit match your vehicle and brake layout?
Start with the exact year, make, model, and body or truck series. Then identify whether the vehicle has front disc and rear drum brakes, drum brakes at both ends, or another arrangement. A kit’s stated fitment is more useful than a broad label such as “universal.” Verify any changes made by a previous owner, since the current brake setup may differ from the original configuration.
Do you need power assist or a disc-brake conversion?
A power brake conversion adds assistance to the brake pedal; a disc-brake conversion changes brake hardware. Some products may address both, but the terms are not interchangeable. For example, the Chevelle product is described as a front disc kit and lists an 11-inch booster, but the provided details do not establish that it includes everything needed for a manual-to-power conversion.
What components are included?
Compare the booster and master cylinder with the rest of the package. A proportioning valve, lines, mounting brackets, and pedal assembly can matter during installation. A more complete kit may simplify parts sourcing, while a smaller kit may leave the buyer to identify additional compatible components. Review the actual listing contents before planning the job.
Will installation require modifications?
Do not assume a conversion kit bolts directly into place. The universal booster listing explicitly warns that brake-line modifications may be needed. Confirm connection sizes, mounting requirements, and the master-cylinder arrangement for the intended vehicle. Brake-system work affects vehicle safety; use qualified installation help if the required procedures are unfamiliar.
Frequently Asked Questions
What does a power brake conversion kit do?
It adds power assistance to a vehicle’s braking system, typically using a booster and master cylinder. The exact parts and installation requirements depend on the kit and vehicle.
Can I use a universal kit on any classic car?
No. “Universal” does not confirm that a kit fits every vehicle. Check mounting, brake-line connections, master-cylinder specifications, and brake layout. The listed universal kit may require line modifications.
Can a disc-brake conversion kit also add power brakes?
Sometimes, but confirm the included components and stated function. A front disc conversion is not automatically a complete manual-to-power conversion.
Should I match the kit to the original brake setup?
Match it to the vehicle’s current configuration. If brakes have been changed, verify the installed parts and layout rather than relying only on the model year.
Which kit is the most complete for a classic Chevy pickup?
The PartsFlow Chevy pickup kit lists a booster, master cylinder, proportioning valve, lines, brackets, and pedal assembly for 1967–1972 C10, C20, and C30 trucks. Confirm fitment and brake setup before purchase.