Universal brake boosters and master cylinders for hot rods, modified and customized cars

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Demotor Performance Universal 7" Dual Diaphragm Zinc Brake Booster & GM Corvette Style Cast Iron Master Cylinder. This booster will bolt up to most street rods, hot rods, and many other vehicles. It offers approximately 20% more stopping power. It has 4 bolts on the bottom that mount to the firewall with 3 3/8" spacing, and it fits most GM applications. Click here to check price and availability on Amazon.com.
A-Team Performance 8" Dual Power Brake Booster Kit with Master Cylinder Pedal Firewall Mount Assembly Bracket Kit. This kit is compatible with disc/disc or disc/drum setups. Proportioning Valves are sold separately. The pedal pivot point is adjustable to 7", 8-.5", 10", 11.5" and 13". Comes with an 8" zinc plated dual diaphragm brake booster. 1" Bore GM style master cylinder. Click here to check price and availability on Amazon.com.
Inline Tube Dual Diaphragm 8" Power Brake Booster Gold Zinc. This power brake booster can be mounted under the floor or on the firewall. The bolt pattern is 3 3/8" center to center in a square pattern. Click here to check price and availability on Amazon.com.
Inline Tube's Dual Diaphragm 8" Power Brake Booster is also available in chrome. Click here to check price and availability on Amazon.com.
Sometimes your car may just not generate the proper amount of vacuum required. Then, an electrical unit will be a perfect solution. This Electric Vacuum Pump Kit Set by MaXpeedingrods is recommended for cars with 15" of vacuum or less at idle. All wiring included with connections for fast and easy installation. Provide vacuum to power brake booster ，Operates when vacuum drops below 18 inches and turns off when over 22 inches. Click here to check price and availability on Amazon.com.

Having a fun and fast car can be great, but being able to stop is even better and also crucial. When your foot hits the brake pedal, it activates the brake fluid in the master cylinder who then pushes the brake fluid out to all the wheel cylinders where they engage the brake shoes or discs thus makes the car come to a safe stop.


It is an easy system but still has a lot of different and very important components, the master cylinder and brake booster being crucial ones and what we will highlight in this article.


Please note. The components are not all the same, and there is a wide range of products available. What you have to consider is what size you need for your car, where it mounts, body, or frame.


Here’s a good guide to selecting the right booster.


Are the brake booster and master cylinder the same?

No, they are not the same, but they do work very well together.


Do I really need a brake booster?

You can have a great brake system and drive the car without a brake booster, but if you want to make it easier to stop the car, you should use a booster as well. A good sign that your brake booster is bad, is when the brake pedal is harder to depress.


What size booster should I get, the bigger the better?

The boosters are powered by a vacuum, and while you can fit a smaller, let’s say 7” booster underneath the car if there’s limited space it’ll work. But generally speaking the bigger booster the better brake assist you will get.


Do I need a master cylinder?

Yes, you can not stop a car without a master cylinder. A sign of a bad master cylinder is when the pedal feels spongy and keeps sinking to the floor. At this point, you need to replace it immediately.


What are the benefits of an electric booster?

Sometimes your car may just not generate the proper amount of vacuum required. Then, this electrical unit will be a perfect solution. Here is one we highly recommend.


Recommended universal brake boosters and master cylinders

Below are three of the most popular Universal brake boosters that can fit on your vehicle, some of them sold in a kit with the master cylinder.


Do brake boosters break and need repair?

Absolutely, as they do have moving components in them. In today's market that is not a problem as there are several rebuild kits available such as these:

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