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

Specs
Sold in Quantity:
Kit
Finish:
Natural
Material Type:
Brass
Outlet Fitting:
Bottom front/Top front are 3/8"-24 IFF (to font brakes), Rearmost port is 9/16"-18 IFF (to rear brakes).
Centerline of Holes:
2.69
Overall Height:
2.00
Overall Width:
1.08
Overall Length:
5.13
Notes
Includes hard lines with fittings, hardware, bracket, and brake light switch.
GM Disc/Disc Proportioning Valve for 1/2-20, 9/16-18 Outlets
VIDEO
GM Disc/Disc Proportioning Valve for 1/2-20, 9/16-18 Outlets

Click image to enlarge

Details

Reviews (5)

Q & A (5)

What's in the Box

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 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 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

Customer Reviews

Rated 4.4 out of 5 by 5 reviewers.
RATING BREAKDOWN
5 reviews
5 Stars
2
4 Stars
3
3 Stars
0
2 Stars
0
1 Star
0
RECOMMEND THIS PRODUCT:

Fastback
Verified Purchaser
Verified Reviewer
Kansas city

Right fit

July 27, 2016
Fit perfectly with speedways ms and brake booster. Fast delivery and easy instillation
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Bam
Verified Purchaser
Rio Rancho NM

Look OEM

March 14, 2016
installed easy enough. Haven't driven with it installed yet though.
Yes, I recommend this product.
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CJ
Verified Purchaser
Verified Reviewer
Washington state

Worked well

September 06, 2015
This was easy to install the included lines were perfect for my application. Looked great when i was finished
Pros:
  • Good Quality Looks Good
  • Easy To Install The Incl
Yes, I recommend this product.
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RapidRonnie
Verified Purchaser
Plattsburg Mo.

Nice set up

February 24, 2011
Shouldnt have to write a reveiw for something that does what its supposed to do, but, so many things we buy dont work or fit like they should, its nice to find something that does what it should. I have installed several of these on customers cars and have not had any problems with them
Pros:
  • Easy To Install
  • Lightweight
Yes, I recommend this product.
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kbs10
florida

good product

April 08, 2010
had to make a trip to the parts store for a front port plug. my set up only used one port for the front.
Pros:
  • "oem" quailty
  • Easy bolt on
Yes, I recommend this product.
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Page 1 of 1

Product Q&A

5 questions : 6 answers

1 answers

does it have a plug in for a switch mine has one

dalej
St. Albans, WV, USA
June 19, 2014

does it have a plug in for a switch mine has one

Answers

June 19, 2014
EricM
This does have a switch and the pigtail for it as shown.
1 answers

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

dalej
St. Albans, WV, USA
June 19, 2014

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

Answers

June 19, 2014
EricM
This may be similar to the stock valve on your car but it may require some fabrication or changing of brake lines or fittings to install. Sorry I do not have a stock replacement valve for your application.
1 answers

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

rcallella
January 06, 2014

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

Answers

January 06, 2014
EricM
You can plumb it either way. There is not advantage either way other than ease of routing or number of fittings required.
2 answers

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

littlejohn
Gray Court, SC 29645, USA
December 10, 2012

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

Answers

March 04, 2013
mlswanny
Hi John, yes this proportioning valve will work, however a residual check valve will need to be installed in the rear line. Wilwood makes a very nice one part number 835-2601876. If you do not have the capabilities of installing this in the line, the prop valve you bought will need to be switched out to function properly! And yes you can use 3/16" front, 1/4" rear. Just keep in mind brake systems work best with pressure not volume, therefore by installing 3/16" on the rear system this will actually give you a higher, harder pedal. By reducing the size of the line, you reduce the volume and up the pressure. The same theory applies to the 1" bore master you purchased. If your pedal is to spongy or just wont stop the car get a master with a smaller bore. I usually try to run a 7/8 bore on most of my installs. All the way from a single piston caliper to 6 piston caliper...
December 10, 2012
Jason
We apologize for the confusion and the master cylinder you received under kit number 9106001 is a one inch bore and will work with disc/drum just fine. The proportioning valve will work with ¼” lines to the rear if so desired if your rod is plumbed that way. The larger line to the rear helps reduce the pressure to the rear to help insure even braking front to rear but is not required. We offer the needed reducer fitting if needed
1 answers

Will this directly bolt in an 87 monte carlo

D
Tampa, Fl
June 08, 2016

Will this directly bolt in an 87 monte carlo

Answers

June 13, 2016
Zach
Expert
Yes if you are running 4 wheel disc brakes yes you can use this on that application
Page 1 of 1

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