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Visit Our Valve Store
The Right Stuff carries a large variety of brake valves and blocks for classic GM and Mopar muscle cars. See our store to find out what we carry for your vehicle. For more info. on what valves were on GM vehicles from the factory, see our article
GM Valve Configurations
Getting our terminology right
Proportioning Valve- A proportioning valve restricts the amount pressure to the rear of a brake system under heavier braking conditions to prevent the rear brakes from locking up. Proportioning valves are usually only found on vehicles with front disc brakes from the factory
- A proportioning valve restricts the amount pressure to the rear of a brake system under heavier braking conditions to prevent the rear brakes from locking up. Proportioning valves are usually only found on vehicles with front disc brakes from the factory
Distribution Block- This block is simply a place to run brake lines to and split the front and rear systems. It does not proportion or meter the brake fluid coming from the master cylinder.
Metering Block- A metering block is found on vehicles with front disc brakes and rear drum only. This valve holds off any fluid from getting through to the front brakes up to a certain pressure. This causes the rear drum brakes to engage just slightly before the front, which results in more level stopping.
Combination Valve- Combination valves combine all three of the above blocks into one. On GM disc brake cars from 67-70 all three of the above valves were on the car. From 71-77 the three valves were combined into one combo valve.
Chrome Combination Valve- Brass valve that is then chromed and polished. Available for 4 wheel drum, 4 wheel disc and two wheel disc applications
Distribution Block- This block was found original on 67, 68, 69 Camaro and Firebird, as well as 68 - 74
PV71 combination valve- Combination valve found factory on GM mid size cars like Chevelle, and GTO from 1971-1977
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