Power Brake Kit w/Cast Master Cylinder

76-77 Ford Bronco

Condition: New
Part Number: K7045
star star star star star
Price: $369.00

Fits: 1966-77 Ford Bronco

This factory style power brake kit is a great replacement for your worn out 1976-77 Bronco brake booster assembly. Bolts right in place with no modification. This power brake kit includes a new 8 inch dual diaphragm 1400psi power brake booster in black to replicate the factory setup. We feel this is hands down the best power brake booster on the market. This power brake kit also includes a new push rod, bracket, master cylinder and brake lines. This kit can also be used to convert your 1966-75 Bronco to power brakes and will require no fender modification for installation.

NOTE FOR '66 BRONCO OWNERS: If your Bronco currently has a  single reservoir master cylinder, there are a few addtitional items we recommend purchasing to make sure everything goes together properly: 
  • Part no, 1842 - Brake Pedal ('66 brake pedals do not have proper connecting point for brake light switch)
  • Part no. 0980 - Brake Light Switch (Factory '66 brake light switch was part of the master cylinder)   


This vacuum booster requires 18 to 21 inches of vacuum. A healthy 302 Ford V8 will provide 19-21" of vacuum which is ideal for this kit. A normal running 170 Ford 6-cylinder will provide 18" of vacuum which is adequate but on the low end. Broncos with modified cams can run lower on vacuum. In this case, or any time vacuum is not within range, you may need to install a vacuum pump or collector for proper performance. If you are unsure of how much vacuum your engine is providing, it's recommended to perform a vacuum test on it prior to installation.

Average Customer Rating: star star star star star (2 customer reviews)

Submit Your Own Review

Review by: Stephen, Mar 10, 2012   star star star star star

When I rebuilt my '68 a few years ago I installed the Tom's front disc conversion kit. After putting a few thousand miles on the rig and towing a few loads of stuff on my trailer it was clear that a bit more braking power was needed. I spent yesterday afternoon installing the No Modify Power Brake Kit. The installation was pretty painless and the results are great! I took it out for a test drive on my usual shake-down loop, it is like driving a different vehicle now, all my old braking/downshift points are way too early. Overall, a very nice upgrade that I should have done sooner.

Review by: Green72, Jul 12, 2012   star star star star star

This is the best "bang for your buck" upgrade I have done. This was the first major upgrade I did to my 72 Bronco and the difference between the stock manual brakes and these power brakes is night and day! Thanks Tom's for another great product!

Prop. 65 Warning for California Residents

WARNING: This product may contain chemicals known to the state of California to cause cancer, birth defects, or other reproductive harm. Learn more