GM Disc/Disc Proportioning Valve for 1/2-20, 9/16-18 Outlets
Universal Fit, Disc Brake System Type, Fixed Proportioning Valve Type, 3-Port Port Quantity
- Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
These proportioning valves are similar to what GM used on many cars in the 70s. They are non-adjustable and may require an adjustable valve in the rear brakes (if needed). Block incorporates metering (for front brakes) and proportioning (for rear brakes) into one unit. For use with four-wheel disc brake systems.
Includes hard lines to connect to a master cylinder with 1/2"-20 and 9/16"-18 outlets.
910-31352 Instructions (PDF)
Item DetailsFor M/C with 1/2"-20 and 9/16"-18 outlets.
NotesBottom Front Port: 3/8"-24 IFF threads - goes to one front brake
Top Front Port: 3/8"-24 IFF threads - goes to one front brake
Middle Top Port: 1/2"-20 IFF threads - comes from master cylinder
Rear Top Port: 7/16"-24 IFF threads - comes from the master cylinder
Rear Most Port: 9/16"-18 IFF threads - goes to rear brakes
Outlet FittingBottom front/Top front are 3/8"-24 IFF (to font brakes), Rearmost port is 9/16"-18 IFF (to rear brakes).
More Like This
GM Disc/Disc Proportioning Valve for 3/8-24 Outlets
GM Disc/Drum Proportioning Valve for 1/2-20, 9/16-18 Outlets
Brake Metering-Hold-Off Valve
GM Disc/Drum Proportioning Valve for 3/8-24 Outlets
Speedway Polished Adjustable Brake Proportioning Valve
Speedway Purple Adjustable Brake Proportioning Valve
Adjustable Proportioning Blocks With Brake Light Switch
Adjustable Proportioning Valve Block, Brake Distribution System
Wilwood 260-8419 Knob Style Proportioning Valve
Tuff Stuff 2302NB Brake Proportioning Valve Kit, Brass
Q & A
After getting the control arms and drop spindles installed last time, we are dying to see what it looks like on the ground. Today we are working with the Speedway Deluxe Disc Brake Kit. Josh and Joe are on a roll!
Tim demonstrates the brake assembly with a Wide 5 drum brake and Speedway's new self-energizing backing plate.
Tim explains the process of adjusting Buick Finned Drums to fit Speedway's self-energizing backing plate assembly.
Project Chevelle upgrades the 4 drum brakes single master cylinder that was an unfortunate set of boxes checked on this Chevelle’s order sheet.
Building a brake system is not difficult if you understand what each component does. Click here for everything you need to know about brake hydraulic valves.