LEED Brakes Hydraulic Power Brake Booster Kit With Adjustable Proportioning Valve Mustang 1971-1973
Highlights
- 9" Slimline Booster Upgrade
- Single-Diaphragm Design
- 1" Dual Bore Master Cylinder
- Adjustable Proportioning Valve
LEED Brakes Hydraulic Power Brake Booster Kit with Adjustable Proportioning Valve for 1971-1973 Mustangs.
This Hydraulic Power Brake Booster Kit takes your 1971-1973 Mustang from factory manual brakes to a pancake! Otherwise known as a Slimline, this booster features a 9" diameter with a single diaphragm and a 1" bore master cylinder, making for a safe new upgrade for your 1st Gen Mustang.
Features and Benefits:
- 9" diameter Slimline (Pancake) single diaphragm brake booster
- Connects master cylinder brake lines to distribution block
- Uses original mounting hardware
- Adjustable proportioning valve allows you to fine-tune brake pressure
- Prevents rear wheel lockup
- 1" bore master cylinder
- Includes dual bowl reservoirs
- Includes brake pedal rod extension
- Plug-and-play pushrod adapter for factory brake pedal
This kit (FC0009HK) from LEED Brakes contains brake lines that connect the master cylinder to the distribution block using original mounting hardware. It also features dual bowl reservoirs, a brake pedal rod extension, and a plug-and-play pushrod adapter for your factory brake pedal. The proportioning valve in this kit is adjustable, so you can prevent your Mustang's rear wheels from locking by fine-tuning brake pressure. Hardware is included to install this new valve.
California Residents: Proposition 65 Warning
Related Categories: Mustang Power Brake Boosters
Only for use on pre-pollution controlled vehicles: This product can be used on vehicles that were manufactured before emissions control regulations were imposed. Pre-pollution vehicles are defined as:
- 1965 and older U.S. manufactured California certified vehicles
- 1967 and older U.S. manufactured federally certified vehicles
Installation Difficulty

Advanced skill is required for this installation.




