JEGS
Brake Proportioning Valve for Disc/Drum Applications [GM]
555-631290
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Disc/Drum Applications
JEGS 555-631290 Brake Proportioning Valve Features:
- Ensures proper brake bias from front to rear to prevent lock up of wheels
- Designed for front disc/rear drum brakes
- Specifications: (1) 7/16 in.-24 & (1) 1/2 in.-20 inlet ports, (2) 3/8 in.-24 ports to front brakes & (1) 9/16 in.-18 port to rear brakes
- Constructed from a one-piece brass body
- A must-have component to complete your custom brake system
JEGS 555-631290 Brake Proportioning Note:
- Designed to be used on stock configuration brake systems on vehicles with disc/drum brakes. Recommended when large-port GM master cylinder is on the firewall.
FAQ
Do you need a proportioning valve with disc drum brakes?
- Yes, the JEGS 631290 Brake Proportioning Valve is essential for maintaining proper brake balance in disc/drum brake setups. It regulates hydraulic pressure to prevent rear wheel lockup, ensuring safe and effective braking. Install this GM proportioning valve for optimal performance in disc/drum applications.
How does a GM proportioning valve work?
- The JEGS 631290 GM Brake Proportioning Valve modulates brake fluid pressure between the front and rear brakes. It ensures balanced braking by reducing pressure to the rear brakes, preventing premature rear wheel lockup in disc/drum brake systems. Experience improved safety and control with this GM proportioning valve.
Are proportioning valves universal?
- Proportioning valves are designed for specific applications. The JEGS 631290 Brake Proportioning Valve is tailored for GM disc/drum setups. While some features may be universal, it's crucial to choose a proportioning valve that matches your vehicle's brake system requirements. Ensure compatibility for effective brake balance.
What does a disc brake proportioning valve do?
- The JEGS 631290 Disc/Drum Brake Proportioning Valve regulates brake fluid pressure, specifically in disc/drum setups. It prevents rear wheel lockup by adjusting the hydraulic pressure sent to the rear brakes, ensuring balanced and controlled braking. Upgrade to this disc/drum proportioning valve for enhanced safety and performance.
Specifications:
Part Type
Product Line
Adjustment Style
Fixed
Front Brake Type
Disc
Inlet Attachment
Female Threads
Inlet Quantity
Two
Inlet Size (in.)
(1) 7/16 in.-24 & (1) 1/2 in.-20
Maximum Psi
N/A
Minimum PSI
N/A
Notes
N/A
Outlet Attachment
Female Threads
Outlet Quantity
Three
Outlet Size
(2) 3/8 in.-24 & (1) 9/16 in.-18
Package Depth
1.40
Package Height
5.80
Package Width
3.20
Part Category
Replacement Parts
Part Fitment
Semi Universal
Pressure Reduction (%)
N/A
Proportioning Valve Finish
Natural
Proportioning Valve Material
Brass
Rear Brake Type
Drum
Shipping Weight
1.65
JEGS Brake Proportioning Valve for Disc/Drum Applications %5BGM%5D is rated
out of
5 by
40.
Rated 5 out of
5
by
Mell from
Perfect replacement part
Part was exact fit for replacement on my 74 camaro
Date published: 2025-12-02
Rated 5 out of
5
by
Anonymous from
Just the right portion
Portioning valve, was just what I needed, my one CCP leaked. Jegs version took care of the issues.
Date published: 2025-07-13
Rated 5 out of
5
by
Jeff B from
Fits AMC’s too!
Perfect fit on my 74 AMC Javelin power disc brake car.
Date published: 2023-01-08
Rated 5 out of
5
by
Googsauto from
Same as original works great
Purchased a few days ago shipping was a problem but JEGS made it wright and really did a great job with customer service!!!
Date published: 2023-01-08
Rated 5 out of
5
by
Lyza from
Great
Was the right thing he needed and wasn't able to find it anywhere else. Thanks
Date published: 2021-10-07
Rated 5 out of
5
by
Davy76 from
Quality part
Part is as described. Bolted up to my bracket with no issues.
Date published: 2021-07-25
Rated 5 out of
5
by
dukemnm from
Item Looks slick and works wonderfully.
The valve looks slick on my pick up truck and it was easy to install. The performance is better than expected.
Date published: 2021-03-17
Rated 5 out of
5
by
Anonymous from
Perfect fit
Needed proportion valve for my 89 Suburban V2500. Perfect fit all the way around and works as it should
Date published: 2021-01-17
Does this fit a 2000 Chevrolet s10
The Jegs 555-631290 valve can be used on a '00 S10, additional adapters may be needed.
Date published: 2026-06-01
Will this fit a 1979 Monte Carlo?
The Jegs 555-631290 valve can be used on a '79 Monte Carlo, additional adapters may be needed.
Date published: 2026-01-13
Will this fit a 1971 Chevrolet c10?
The Jegs 555-631290 valve can be used on a '71 C10, additional adapters may be needed.
Date published: 2025-05-01
Will this fit a 1979 gmc sierra k1500
The Jegs 555-631290 valve is universal fit, additional adapters may be needed.
Date published: 2024-11-04
Will this fit an 85 GMC C20 5.7
The Jegs 555-631290 valve is universal fit, additional adapters may be needed.
Date published: 2024-05-22
Will this valve fit a 1978 Jeep CJ7 with front disc and rear drum brakes?
The Jegs 555-631290 proportioning valve is universal, line modifications may be necessary.
Date published: 2024-04-12
Will this fit a 1978 f250??
The Jegs 555-631290 valve does not fit a '78 F250.
Date published: 2023-04-26
Will this part fit a 1968 Chrysler New Yorker
The Jegs 555-631290 GM proportioning valve does not fit a '68 Chrysler New Yorker.
Date published: 2023-03-02
JEGS 631495Replace the damaged or missing hard-lines that connect your master brake cylinder to the proportioning valve with this set of replacements from JEGs. Designed as a direct-fit, these lines are pre-bent, with fittings and the proper flares. These pieces ...
JEGS 555-631452 Adjustable Brake Proportioning Valve Kit Features: Designed with a rotary adjustment valve with directional arrows for fine incremental adjustments reducing or increasing the front-to-rear bias Includes proportioning valve, pre-bent steel lines, (5) 3/8 in.-24 brake line fittings, 2-wire ...
Some parts are not legal for use in California or other states with similar laws / regulations
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