Master Power Brake Booster Conversion Kit Black With 8" Dual Booster And Master Cylinder Bronco 1966-1977

Master Power:


  • 8" Dual Diaphragm Booster
  • 1" Bore Master Cylinder
  • Requires 18" of Vacuum or More
  • Works With Disk or Drum Brakes

Master Power Black Brake Booster Conversion Kit with an 8" Dual Booster and Master Cylinder for all 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976 and 1977 Ford Broncos.

Improve the overall power of your 1966-1977 Bronco's Brakes by ordering this Master Power Black Brake Booster Conversion Kit with an 8" Dual Booster and Master Cylinder. Designed to work on all Bronco engines, this kit will make you feel like you have an entirely new brake assembly on your rig.

Features and Benefits:
- Helps Reach Maximum Braking Performance
- 8-inch Dual Diaphragm
- Black Powder Coat Finish
- Bracket Features Correct Angle
- Works with Either Disc or Drum Brakes

This brake booster conversion kit from Master Power will help your Bronco reach its maximum braking performance. With an 8-inch dual diaphragm, this kit features a power booster and master cylinder that have black powder coat finishes. Along with the properly angled firewall bracket, this kit will provide more than enough power when using your brakes. Master Power's firewall bracket features the correct angle and will bolt directly to the firewall. You'll also be able to enjoy this fantastic kit whether your Bronco has disc or drum brakes.

Kit Includes:
- Dual Outlet Master Cylinder with 1-inch bore
- 8-inch Dual Diaphragm Power Booster
- Firewall Bracket and Pedal Linkage
- Vacuum Hose with Intake Manifold Fitting
- Bench Bleeding Kit

Please Note: If you have a disc/drum or a 4-wheel disc setup, you will need to use the appropriate combination valve to properly balance your braking system.

*The inner fender panel needs to be either notched or replaced for the clearance of the booster.

Warning: The Booster requires at least 18 inches of vacuum for proper operation.

Vehicle Fitment:
- 1966-1977 Ford Bronco

California Residents: Proposition 65 Warning

Installation Difficulty


Intermediate skill is required for this installation.

Installation Videos

Video Transcript

If you've been following the build on our 68 Bronco, you know we're adding a fuel injected 347 cubic inch Ford racing crane engine to our truck. Adding that kind of horsepower, we definitely want to upgrade the brakes at the same time, so we're going to put disc brakes on all 4 corners and while we're at it, we're going to burn over to power disc brakes by using this conversion kit from Master Power.

This power brake conversion kit from Master Power's the perfect way to add power brakes to any 1966 through 1977 Bronco, when equipped with a V8 engine. It includes the 8 inch dual booster as well as a GM style master cylinder, a bench bleed kit, an adjustable brake rod and everything necessary to install it on your Bronco. This will work with either drum or disc brakes. At this point in our build, we don't have our brake lines finished on our Bronco yet, but we're going to show you how the Master Power piece is going to install through your firewall.

The assembled booster's going to mount on your firewall. As it's assembled, it's kind of on the heavy side, so to make it easier, we're going to remove the master cylinder to make the wheel a little more manageable. [inaudible 00:01:17] put the master cylinder side after you remove it, be careful. There's a little rod here. You just want to make sure that doesn't fall out, so if you put it back together without it, it's not going to work. The booster's a lot more manageable without the master cylinder attached. It's still not a bad idea, though, to get an extra pair of hands to help hold it, because these actually can be kind of difficult to line up.

Start by getting them all sort of hand tight. The 5th bolt's going to be the harder one to get to. It's actually down below here, kind of behind that cylinder head. Let's put the master cylinder back on for now. We're just going to mop this part up with the pedal, since we're not quite ready to install it yet. What you're going to do is take the adjustable rod, put the sleeve on it and thread it into the back of the booster assembly. Thread it in and install the boot in the firewall. It is connected to the pedal with the brake light assembly.

At that point, that's basically how you are to install the system. If you want a custom bend your break lines for the master cylinder and then bleed your brake system like normal. The power brake conversion kit from Master Power's very easy to install, fits great under the hood, it's going to make driving the Bronco a lot more fun. Keep in mind when operating the system, you will need 18 inches of vacuum for it to work properly, so if your engine's not putting out the proper vacuum, make sure you have an auxiliary vacuum source.

Vehicle Fitment

This product will fit the following Bronco years:

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