Power Booster/Master Cylinder

Dual diaphragm booster provide more power assist to the brakes.

Your original booster may have had a bracket already attached to it. If you wish to install one of our universal boosters (#2221, #2222, #2223, #2224, #2231), then you may need to install a bracket (#4650, #4651, #4652) to most closely match your original booster setup or needs.

There is always a chance that you will have to make some modifications when installing a universal brake booster. Normally the pedal rod length will have to be adjusted and that is why purchasing a pedal rod extension kit (Tuff Stuff #4750) is always a wise choice.

Yes, when converting to power brakes you must use a proportioning valve (#2301, #2302, #2303). They come complete with bracket and the lines from the master cylinder to the proportioning valve.

In this case you will have to check that you are producing at least 18” of vacuum. Your system may require a vacuum assist pump if your vacuum is inadequate, causing a hard pedal.

It all depends on the brakes you are running. If you are using a factory disc/disc application then you would use a 1-1/8” bore master cylinder, but if they are aftermarket calipers you would use a 1” bore master cylinder. Aftermarket calipers are bigger than original equipment and require more pressure to open. In most cases with disc/drum applications on earlier models you would use a 1” bore master cylinder. There are always exceptions when building a street rod. Tuff Stuff technicians can guide you through the process of ordering the proper brake booster and master cylinder to complete your project.

We build our dual ported master cylinder so you can redirect your brake lines from the opposite side of the master cylinder. The ports on the other side of the master cylinder are then plugged.