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Disc-Drum GM Proportioning Valve
 
 
 
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Starting at $59.99

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Watch the video below to learn more about the differences in brake lines, flare types and fittings you may want to consider before plumbing away on your current chassis project.

 

These proportioning valves are what GM used on many cars in the 70's. They are non-adjustable and may require an adjustable valve in the rear brakes if needed. This is a combination valve which incorporates metering (for the front brakes) and proportioning (for the rear brakes) into one valve. 

910-31351 Instructions (PDF)

  • Bottom Front Port has 3/8"-24 IFF threads - goes to one front brake
  • Top Front Port has 3/8"-24 IFF threads - goes to one front brake
  • Middle Top Port has 1/2"-20 IFF threads - comes from master cylinder
  • Rear Top Port has 7/16"-24 IFF threads - comes from the master cylinder
  • Rear Most Port has 9/16"-18 IFF threads - goes to rear brakes
Reviews for Item #: 91031351
Price: $59.99
GM Proportioning Valve - Disc Front/Drum Rear
Item #:
91031351
Price:
EA
$59.99

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