top of page

This is a complete bolt in kit designed to work on 1967-1979 Ford F100, F150, F250 and F350 trucks that gives you a later model Super Duty power brake booster and master cylinder! You will get significantly more fluid pressure and volume coming out of this master cylinder. This kit installs in about an hour and requires no cutting or permanent modification. It works with your existing brake pedal.

For high resolution pictures, see this page:


I have different versions of mounting brackets based on what brake booster type your truck came with originally. When you purchase, select truck year and brake booster type- straight rod common for 1967-76 trucks, cantilever on most 1977-78 trucks, and an angled booster with an offset eyelet on most 1979s.


The master cylinder has a 1 3/8" (1.375") bore. Your factory master cylinder likely has a bore of 1.00" or 1.25". Assuming you have the larger 1.25" bore, the factory bore size has surface area of 1.227 square inches. A bore of 1 3/8" has surface area of 1.485 square inches. This makes for an increase of about 21% of fluid coming out of the master cylinder as compared to your factory one, with the same amount of brake pedal movement. In other words, goodbye squishy/low brake pedal!


This setup puts out about 1600 to 1700 psi brake pressure.  Do not use this with front drum brakes. When used with front drum brakes, it will cause lurching and accidental skidding. This brake booster is a whopping 11" dual diaphragm. That's about as big as they get! Most factory 73-39 brake boosters are either a single 9", a single 11" or a dual 9". This Super Duty booster is a dual 11" so it provides roughly double the boosting power as compared to any of the factory options. You will notice a strong increase in stopping power!


Now with this booster being so big, valve cover clearance is an issue. This will fit with most V8 engines with factory valve covers. Tall valve covers do not work with this booster. Pictured is a 360 FE engine and you can see there is about 1" clearance there. Better change those valve cover gaskets before installing this booster!


Too see pictures and info of original booster types, see this link:


Included parts with full kit:


Firewall to SD booster bracket

Super Duty Brake Booster 1999-2004 style (Motorcraft 5C7Z2005A or Cardone 5474420 or similar)

Super Duty Master Cylinder w/ reservoir, 1999-2004 style (Motorcaft 5C3Z2140MA or Oreilly NMC23201 or similar)

Custom steel bushing designed to mate SD booster eyelet to factory bake pedal

High quality grade 8 hardware for entire install

Flare adapter fittings- to connect standard 3/8" inverted flare fittings to the master cylinder


These brackets are designed, laser cut, and formed right here in the USA. The parts supplied with them are top quality

Vacuum Super Duty Booster Master Kit for 1967-79 Ford Trucks

    bottom of page