As of 1/8/22 These are out of stock and I do not have an estimated date they will be back in stock. Hopefully within 3-4 weeks but no promises!


This is a first of its kind- a complete bolt in kit designed to work on 1973-1979 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.
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 is really meant for disc brakes. When used with all drum brakes, it will cause lurching and accidental skidding.
This brake booster is a whopping 11" dual diaphram. 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!


This setup puts out about 1600 to 1700 psi brake pressure. 


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, cut out on a CNC plasma table and welded right here in the USA. The parts supplied with them are top quality.

Vacuum Super Duty Booster Master Kit for 1967-79 F series