1966-75 Ford Bronco Pro-Series POWER BRAKE BOOSTER CONVERSION KIT, Dual Diaphragm (#HP-4120-2)


Optional Upgrades

No extra shipping charge for Upgrades






with disc/drum Proportioning Valve

for 1966-75 Ford Bronco.

   (see our other listing for 76-77 Bronco)

NOTE: If you have 4 Wheel Disc Brakes just check off the Upgrade, it’s 5.00 more  (HP-4120-4)

You may need a Stop Light Switch for your 66-67 Bronco, 

just check off the Upgrade, it’s 25.00 more (see photo 6)


      We Sell the Best Disc Brake Kits in the USA!


Black Powder Coated Fire Wall Bracket

Heavy-Duty 8″ Dual Diaphragm Booster (not the smaller 7′ single)

Heavy-Duty Master Cylinder with 1-1/8″ Bore (not a 1″ bore)

Disc/Drum Pro-Valve w/extra Fittings

Brake Line Set

Pedal Rod Extension w/Boot

   30″ Vacuum Hose with a Manifold Fitting

Master Cylinder Bench Bleeder Kit

Easy-to-Follow Instructions


NOTE: Disc/Disc Pro-Valve is a Upgrade

NOTE: Stop Light Switch is a Upgrade

On some Trucks the Stock Air-Cleaner may need to be checked for clearance.

Our Power Brake Booster Kits provide an easy to install solution

for upgrading your Ford Bronco to a Higher Standard of Brake Performance!

1 Year Warranty on Parts.

This Kit comes with a Lager Bore Master Cylinder for Trucks with Big Tires!

We Pre-Adjust every Booster Pin to Match the Master Cylinder so you don’t have to deal with that.

We Stand Behind our Products and are here to Answer your Questions.

We Took the Guess Work Out…..This is the Power Brake Kit you Need!

Shipping w/Tracking in the USA 50 States.




There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.