Product Summary

Universal Fit, Disc Brake System Type, Brass, Natural

  • 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 disc 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

Key Specs

Proportioning Valve TypeFixed
Port Quantity3-Port
Material TypeBrass
FinishNatural
ColorNatural

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Speedway Motors 91031352 Details

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.

Item Details

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

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Speedway Motors 91031352 Specifications

KEY SPECS
MFG. Part #91031352
BrandSpeedway Motors
Proportioning Valve TypeFixed
Port Quantity3-Port
Material TypeBrass
FinishNatural
ColorNatural
GENERAL
Brake System TypeDisc
Proportioning Valve LocationLeft Mount
Thread Pitch3/8"-24 IFF | 9/16"-18 IFF
Outlet FittingBottom front/Top front are 3/8"-24 IFF (to font brakes), Rearmost port is 9/16"-18 IFF (to rear brakes).
Pressure Safety Switch IncludedYes
Overall Length5.13"
Overall Width1.08"
Overall Height2.00"
Centerline of Holes2.69"
NotesIncludes hard lines with fittings, hardware, bracket, and brake light switch.
Sold in QuantityKit

Ratings & Reviews

4.8

25 Reviews

Customers say

Customers appreciate the easy installation for our product, the brake proportioning valve, as well as its perfect fitment for both front and rear disc brakes. Its high-quality design, efficient performance, and superior functionality, particularly in conversion work, are praised. Some buyers had to make multiple attempts for a leak-free setup, but the product's compatibility with various car models and its usefulness in disc/drum conversions received positive remarks. Despite requests for alternation in the pedal design, the product overall inspires repeat purchases owing to its reliable performance and effective proportioning pressure. The product is esteemed for its resemblance to OEM parts, offering swift installation and optimal results.