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#91031352
GM Disc/Disc Proportioning Valve for 1/2-20, 9/16-18 Outlets
- 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
$115.99
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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 Type | Fixed |
| Port Quantity | 3-Port |
| Material Type | Brass |
| Finish | Natural |
| Color | Natural |
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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 brakeTop 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
Charts
910-31352 Instructions (PDF)
Guides & Documents
Speedway Motors 91031352 Specifications
Speedway Motors 91031352 Specifications
| KEY SPECS | |
|---|---|
| MFG. Part # | 91031352 |
| Brand | Speedway Motors |
| Proportioning Valve Type | Fixed |
| Port Quantity | 3-Port |
| Material Type | Brass |
| Finish | Natural |
| Color | Natural |
| GENERAL | |
| Brake System Type | Disc |
| Proportioning Valve Location | Left Mount |
| Thread Pitch | 3/8"-24 IFF | 9/16"-18 IFF |
| Outlet Fitting | Bottom front/Top front are 3/8"-24 IFF (to font brakes), Rearmost port is 9/16"-18 IFF (to rear brakes). |
| Pressure Safety Switch Included | Yes |
| Overall Length | 5.13" |
| Overall Width | 1.08" |
| Overall Height | 2.00" |
| Centerline of Holes | 2.69" |
| Notes | Includes hard lines with fittings, hardware, bracket, and brake light switch. |
| Sold in Quantity | Kit |
Ratings & Reviews
4.9
36 Reviews
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.
Ratings & Reviews
4.9
36 Reviews
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.
4.9
36 reviews
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Filter by Ratings
Yes
5.0
a month ago
Giant Don
Cincinnati, Ohio
Verified
Fit was perfect for my application
Would Recommend
Always use this proportioning valve
5.0
5 months ago
Ron
Bartlett tn
Verified
Great valve the has separate ports for each front wheel. Available as drum/disc or disc/disc configuration. Comes with tube connections to master cylinder as well as mounting hardware.
Would Recommend
Yes
5.0
a year ago
Rayzzer
North Carolina
Verified
Worked great and looks good
Would Recommend
Would buy again
4.0
a year ago
Bob
Az.
Verified
Changed my 56 chevy to disc brakes and dual master cylinder.
Would Recommend
I would buy again
5.0
a year ago
Joe
LongIsland ny
Verified
Hooked up to my Booster put the lines on to the master cylinder and from the brakes everything had to be tweaked or rebent but work beautiful
Would Recommend
good piece
5.0
a year ago
Barry
Hampton VA.
Verified
I used one just like this and it works great so I'm putting this one in my 1948 Chevy Coupe
Would Recommend
I would buy this product again
5.0
a year ago
Janet4106
Rayne, La
Verified
everything fit and worked correctly
Would Recommend
Disc disc proportioning valve.
5.0
a year ago
As
South Dakota
Verified
Product worked perfectly. No leaks and well made.
Would Recommend
Helped my brake kit work better
5.0
a year ago
Mob 8oss
Santa Clarita, ca
Verified
works great and helped stop the car better for sure.
Would Recommend
I would recommend
5.0
a year ago
car nut
dike iowa
Verified
did the job but could use directions recommending centering pin
Would Recommend
Showing 10 of 36 reviews
Questions & Answers
Questions & Answers
8 Questions • 9 Answers
This proportioning valve has two outlets for the front brakes. Are these both to be used (one for each wheel) or be used as one or the other?
by Joel
• 5 years ago
1 answer
View Answer
I have this same valve purchased thru MP Brakes. I have NO PEDAL after bleeding the brakes 5 times. I have a new master, with plugs in it, the pedal is at the top. My valve is mounted sideways, should this make a difference?
by Scott
• 8 years ago
1 answer
View Answer
I went from drum to disc in the rear of my 69 nova. I purchased this proportioning for the job. Every time I try to bleed the system the valve flips and I get no fluid to the rear of the car? Any ideas for me? I have tried to gravity bleed the system as well and bench bleed the master? Any help would be great. Thx
by John
• 8 years ago
1 answer
View Answer
Will this directly bolt in an 87 monte carlo
by D
• 10 years ago
1 answer
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does it have a plug in for a switch mine has one
by dalej
• 12 years ago
1 answer
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will this fit a 1979 cadillac fleewood brougham with a 425 4 barrell with 4 wheel disc brakes if not do you have one I need a brake proportitioning valve for a 1979 cadillac fleedwood brougham with a 425. 4 barrel. I have 4wheel disc brakes
by dalej
• 12 years ago
1 answer
View Answer
when hooking this up, do you have to use both front outlets or can i use just a single front outlet? is there any advantage to using both front outlet
by rcallella
• 12 years ago
1 answer
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can i use this with front disc rear drums. i purchased your 7" booster and master cylinder 9106001 but when i got ready to install it looked at my reciept and its a disc disc and i have disc drum . will this still work whith this proportioning valve. and can i use 3/16 lines to front and 1/4 to rear. Thanks john
by littlejohn
• 13 years ago
2 answers
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8 of 8 questions shown