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$64.99
GM Disc/Drum Proportioning Valve for 1/2-20, 9/16-18 Outlets
GM Disc/Drum Proportioning Valve for 1/2-20, 9/16-18 Outlets

GM Disc/Drum Proportioning Valve for 1/2-20, 9/16-18 Outlets

Universal Fit, Disc/Drum Brake System Type, Fixed Proportioning Valve Type, Brass, Natural

25 Reviews | 16 Answered Questions
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GM Disc/Drum Proportioning Valve for 1/2-20, 9/16-18 Outlets
GM Disc/Drum Proportioning Valve for 1/2-20, 9/16-18 Outlets
GM Disc/Drum Proportioning Valve for 1/2-20, 9/16-18 Outlets
GM Disc/Drum Proportioning Valve for 1/2-20, 9/16-18 Outlets
GM Disc/Drum Proportioning Valve for 1/2-20, 9/16-18 Outlets
GM Disc/Drum Proportioning Valve for 1/2-20, 9/16-18 Outlets
GM Disc/Drum Proportioning Valve for 1/2-20, 9/16-18 Outlets
GM Disc/Drum Proportioning Valve for 1/2-20, 9/16-18 Outlets
GM Disc/Drum Proportioning Valve for 1/2-20, 9/16-18 Outlets
GM Disc/Drum Proportioning Valve for 1/2-20, 9/16-18 Outlets
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GM Disc/Drum Proportioning Valve for 1/2-20, 9/16-18 Outlets
GM Disc/Drum Proportioning Valve for 1/2-20, 9/16-18 Outlets
GM Disc/Drum Proportioning Valve for 1/2-20, 9/16-18 Outlets
GM Disc/Drum Proportioning Valve for 1/2-20, 9/16-18 Outlets
GM Disc/Drum Proportioning Valve for 1/2-20, 9/16-18 Outlets
GM Disc/Drum Proportioning Valve for 1/2-20, 9/16-18 Outlets
GM Disc/Drum Proportioning Valve for 1/2-20, 9/16-18 Outlets
GM Disc/Drum Proportioning Valve for 1/2-20, 9/16-18 Outlets
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Part # 91031351
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  • This non-adjustable proportioning valve is similar to 70's GM valves and provide OEM appearance
  • This block incorporates metering for front brakes and proportioning for rear brakes into one unit
  • For use with disc front and drum rear brake systems
  • Hard lines are included to connect to a master cylinder with 1/2"-20 and 9/16"-18 outlets
  • Two 3/8"-24 IFF outlets for the front brakes and one 9/16"-18 IFF outlet for the rear brakes

Details

Brake System Type:
Disc/Drum
Proportioning Valve Type:
Fixed
Proportioning Valve Location:
Left Mount
Port Quantity:
3-Port
Thread Pitch:
3/8"-24 IFF | 9/16"-18 IFF
Material Type:
Brass
Finish:
Natural
Color:
Natural
Pressure Safety Switch Included:
Yes
Overall Length:
5.15"
Overall Width:
1.08"
Overall Height:
1.95"
Overall Thickness:
1.08"
Centerline of Holes:
2.68"
MFG. Part #:
91031351
Sold in Quantity:
Each

Info

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 front disc, rear drum brake systems.

Includes hard lines to connect to a master cylinder with 1/2"-20 and 9/16"-18 outlets.

Item Details

For M/C with 1/2"-20 and 9/16"-18 outlets.

Notes

Bottom 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

Specs


Charts

GM Proportioning Valve Plumbing Instructions (PDF)

Outlet Fitting

Bottom front/Top front are 3/8"-24 IFF (to font brakes), Rearmost port is 9/16"-18 IFF (to rear brakes).

Notes

Includes hard lines with fittings, hardware, and bracket. This is a combo valve (metering for front/proportioning for rear) into one valve. Residual valves NOT built in.

Important Messages:

  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
Some parts are not legal for use in California or other states with similar laws/regulations

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