1958-64 Chevy Car 8 Inch Brake Booster & Master Cylinder Kit

Master Cylinder 

These high-tech Corvette-style master cylinders were designed using OE specifications and 100% tested.  They have a 1" bore and are suited for disc/drum combinations. Each master cylinder is ported on both the left and right sides, allowing for installation in many different applications. This exclusive design features a mating flange that works with applications requiring 3-1/8” through 3-3/8” bolt patterns.  These master cylinders will work with manual or power brake systems and can be quickly changed with the included adapter pin to plug the deep well.  The wide body and low profile gives this master cylinder the clearance you need when installing in tight areas and yet it maintains a large volume of fluid necessary for 2 and 4 wheel disc brake applications.

• 1" bore
• 3/8"-24 IFF outlet ports on both sides
• Plugs are included for the unused ports
• Mount spacing is 3-3/8", accommodates 3-1/8" applications 
• Works with power or manual brake systems
• Compact, for installation under the floor or on the firewall
• Suited for either disc/disc or disc/drum combinations 
• Stroke of this master cylinder is approximately 1-1/16"
• Has a piston adaptor that will allow for power or manual applications

Learn more about selecting the proper master cylinder for your vehicle by reading our tech article. Brake System Selection. 

Brake Booster

Compact, 8" diameter for installation under floor or on firewall of almost any vehicle. Zinc chromate finish.

• 3-3/8" Bolt Pattern (Firewall Side)
• 3-3/8 Center to Center Bolt Hole (Master cylinder Side)
• Uses adjustable pin
• Great for installs on GM A, F, X, Body Cars with Big Blocks or Engines with tall headers

Learn more about the proper uses of residual valves by reading our tech article. Brake System Selection. 

Booster Bracket

This bracket makes it easy to convert to power brakes while keeping the master cylinder level. The bracket is designed to work with 1958-64 Chevrolet Full Size passenger cars such as the Bel Air, Biscayne, Impala and Caprice. The booster side of this bracket has the common 3-3/8” center to center both vertical and horizontal.  

• Makes it easy to convert to power brakes
• 3-3/8” center to center both vertical and horizontal - booster side
• Designed to work with 1958-64 Chevrolet Full Size passenger cars (Bel Air, Biscayne, Impala, Caprice)

Note: Depending on the application, this kit, in many cases changes the mechanical advantage or pedal ratio. With power assist less pedal pressure is required and to help eliminate some of the pedal travel the attachment location on the pedal arm may be further from the pivot point. You will need to have a straight alignment of the rod to the assembly and also a straight in alignment of the push rod to the booster.

Proportioning Valve

• Aluminum distribution block with built in adjustable brake proportioning valve
• Brake proportioning valve allows quick and easy adjustments to rear brake pressure
• Works with drum/drum, disc/drum, and disc/disc applications
• Features dual front outlets to allow using the block as a front brake line tee
• Steel mounting bracket positions block horizontally under your master cylinder
• Kit includes stainless steel master cylinder lines, flare fittings, and mounting hardware
• Included brake light pressure switch that simplifies brake pedal and under dash area
• All ports designed for 3/16-inch 45-degree double flare brake lines with 3/8-24 tube nuts
• Available in black or chrome finishes (bracket and the distribution block)
• Does not incorporate residual pressure valves and must be installed separately if needed

All In One Solution for Brake Distribution and Rear Brake Bias Adjustments

Adding an adjustable brake proportioning valve to your vehicle helps dial in the exact amount of fluid pressure to the rear brakes that you desire for your vehicle’s brake type, weight, and tire contact patch, but plumbing your new braking system on your project vehicle does not have to be difficult. You can easily save yourself time and frustration by utilizing our compact distribution block with built in adjustable brake proportioning valve and brake light pressure switch. Instead of using a bunch of brass fittings, or an ancient combination valve that might not be setup properly for your brake system, and then tossing in an adjustable proportioning valve somewhere in the rear brake line (and hope you can reach it easily enough for adjustment), this little wonder will do it all for you.

We Make It Easy with a Pre-Bent Mounting Bracket and Lines

We designed our adjustable brake proportioning valve distribution block to be easy to install and plumb for any system. We include a .123-inch thick pre-bent mounting bracket designed to work with standard horizontal two bolt/stud master cylinder mounting patterns that places the block horizontally under the master cylinder. This provides a clean mounting solution while keeping the lines to from the master cylinder to the distribution block short. Stainless steel pre-bent lines are included to plumb your master cylinder to the block as well.

Easy Adjustability for Any Braking System, Disc or Drum

Compatible with four-wheel drum, disc/drum, or disc/disc brake systems, the aluminum distribution block is machined for standard 3/8-24 double flare fittings for both the IN and OUT ports to use common 3/16-inch brake lines. Furthermore, we have included two front OUT ports to allow plumbing the front brakes separately, or you can plug one port with a standard 3/8-24 male flare port plug and use an inline tee elsewhere in your engine compartment (perfect for under floor master cylinder applications).

The rear portion of the distribution block feeds a single outlet that you can adjust brake fluid pressure output on via the built in brake proportioning valve, sometimes referred to as a brake bias adjuster, with a simple rotary adjustment knob. If your classic truck or muscle car is using a factory 1/4-inch rear brake line (common on rear drum applications back in the day) you can use the included brake line adapter that will allow the 1/4-inch line’s 7/16-24 fitting to thread in. Once plumbed the adjustment knob allows simple and easy rear brake circuit bias adjustments right at the master cylinder.

Includes Brake Light Pressure Switch and Comes in Black or Chrome Finishes

Available in a black or chrome finish, the choice is yours if you want our brake distribution block with adjustable proportioning valve to disappear under your hood or stand out with some flash. The included brake light pressure switch allows factory or aftermarket brake light circuit wiring to be connected for your vehicle’s brake light circuit without the hassle of fabricating a brake switch mounting bracket under the dash. This is especially helpful on compact hot rods with little room behind the dash, or for vehicles with floor mounted master cylinders and brake pedal arms where an electrical contact switch is difficult to incorporate. At just under 4-inches long and barely and 2 inches wide (horizontally mounted) our distribution block fits in the tightest of engine compartments or along frame rails.

Booster Tech Tip (GIF)

Brake System Builder's Tip (JPG)

• 8" O.D.
• 5-1/8" main body length
• 10-1/2" overall length
• Back of the booster to the end of the threaded plunger rod is 4-1/8"
• Firewall mounting studs are ¾" long at 3-3/8" center-to-center
• Front master cylinder studs are 1-1/8" long at 3-3/8" center to center