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Universal Power/Manual Master Cylinder, 1 Inch Bore, Corvette-Style

Specs
Material Type:
Steel
Sold in Quantity:
Each
Feed:
Dual
Finish:
Natural
Outlet Fitting:
3/8"-24
Centerline of Holes:
3.38
Overall Height:
4.75
Overall Width:
4.50
Mounted Length:
8.00
Bore Size:
1.00
Notes
Pushrod to mounting flange is 5-1/2". Two 3/8"-24 IFF outlet ports on both sides of the cylinder. Plugs are included for the unused ports. Works with both manual or power brake setups.
Universal Power/Manual Master Cylinder, 1 Inch Bore, Corvette-Style
Universal Power/Manual Master Cylinder, 1 Inch Bore, Corvette-Style
Universal Power/Manual Master Cylinder, 1 Inch Bore, Corvette-Style
Universal Power/Manual Master Cylinder, 1 Inch Bore, Corvette-Style
Universal Power/Manual Master Cylinder, 1 Inch Bore, Corvette-Style
VIDEO
Universal Power/Manual Master Cylinder, 1 Inch Bore, Corvette-Style

Click image to enlarge

Details

Reviews (16)

Q & A (30)

What's in the Box

Info

These high-tech corvette-style master cylinders were designed using OE specifications and 100% tested.  They have a 1" bore and are suited for disc/drum combinations. Each master cylinder is ported on both the left and right sides, allowing for installation in many different applications. This exclusive design features a mating flange that works with applications requiring 3-1/8” through 3-3/8” bolt patterns.  These master cylinders will work with manual or power brake systems and can be quickly changed with the included adapter pin to plug the deep well.  The wide body and low profile gives this master cylinder the clearance you need when installing in tight areas and yet it maintains a large volume of fluid necessary for 2 and 4 wheel disc brake applications.

  • 1" bore
  • 3/8"-24 IFF outlet ports on both sides
  • Plugs are included for the unused ports
  • Mount spacing is 3-3/8" on center
  • Works with power or manual brake systems
  • Compact, for installation under floor or on firewall
  • Suited for either disc/disc or disc/drum combinations 
  • Stroke of this master cylinder is approximatlely 1-1/16"

Brake System Builders Tip (Link)

Learn more about selecting the proper master cylinder for your vehicle by reading our tech article. Brake System Selection. 

Item Details

Dual reservoir master cylinder
1" bore, Shallow Hole, Dual Port, Plain

Customer Reviews

Rated 4.4 out of 5 by 16 reviewers.
RATING BREAKDOWN
16 reviews
5 Stars
12
4 Stars
2
3 Stars
0
2 Stars
1
1 Star
1
RECOMMEND THIS PRODUCT:

olderone
Verified Purchaser
arkansas city KS

top of the line all o the time

November 16, 2016
the service is out standing and the delivery is just as great NEVER LATE.
Yes, I recommend this product.
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JakeT
Verified Purchaser
Verified Reviewer
Mass.

Quality unit.

September 27, 2016
It's a heavy duty to unit. Especially like the fact that it is manual or power. In addition it has ports on both sides of the body making installation easy.
Pros:
  • Heavy Duty
Yes, I recommend this product.
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Duck
Verified Purchaser
Piedmont Ok.

Stops on a dime.

June 26, 2016
Works well on my 67 Shell Valley Cobra.
Yes, I recommend this product.
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Lee
Verified Purchaser
Verified Reviewer
MS Gulf Coast

Worked great!

May 30, 2016
This master cylinder worked great for me. It has ports on both sides making it easy to configure.
Yes, I recommend this product.
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Denny
Verified Purchaser
Boston MA

Brake job

December 22, 2015
Easy to install has outlet on both sides
Pros:
  • Kit Contains Everything
Cons:
  • None
Yes, I recommend this product.
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Don
Verified Purchaser
Verified Reviewer
Guthrie, Okla.

Worked Great

July 27, 2015
It worked great withthe pedalassembly I had and bolted right up. Have not filled with fluid yet and tried but it should work just fine. Looks well made and and nice looking.
Yes, I recommend this product.
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Ken
Verified Purchaser
Verified Reviewer
NE Oklahoma

Great product

July 12, 2015
Easy install. Great to have flexibility of output lines on both sides of master cylinder.
Yes, I recommend this product.
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camaro 1
Verified Purchaser
IA

works good

June 23, 2015
I used this with a hydro boost and it worked just fine
Yes, I recommend this product.
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Chris
Verified Purchaser
Verified Reviewer
Chicago il

THE PERFECT FIT

June 17, 2015
i put this on my 1952 ford mainline when i wanted to upgrade the brakes to make them must safer for the road.
Pros:
  • Quality Casting
  • Easy Install
  • Comes With Bleeder
Yes, I recommend this product.
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Marine
Verified Purchaser

I need to talk to customer service about

April 06, 2015
In less than a year I've had to buy 2 of these items, the mechanic said the first Master Cylinder was not functioning properly so I had to buy a second one, I don't even know if the first one is under warranty
No, I would not recommend this product.
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Page 1 of 2

Product Q&A

30 questions : 32 answers

1 answers

what push rod do i need

49moline
March 24, 2015

what push rod do i need

Answers

March 25, 2015
EricM
The pushrod needed will have to do mostly with your pedal assembly. I have listed some common push rods that are used. 91031520 91031522 91031524 91001726
1 answers

will this product fit 1986 corvette

coffey
March 20, 2015

will this product fit 1986 corvette

Answers

March 20, 2015
EricM
This master cylinder number works on many years and models and would work on your 86 Corvette as long as the mount pattern was between 3 1/8" and 3 3/8” center to center. If used with a booster make sure to install the slug into the piston to convert to power brakes and if manual brakes leave it out. The outlets are both 3/8" x 24 inverted flare and may require adapter fittings to go to your existing lines.
1 answers

does the rubber gromet where the rod goes come with the master cylinder i need the master cylinder i have the rod but your picture does not show a rubber boot to keep the dirt out of the master cylinder

quest1946
Kenosha, WI, USA
December 21, 2014

does the rubber gromet where the rod goes come with the master cylinder i need the master cylinder i have the rod but your picture does not show a rubber boot to keep the dirt out of the master cylinder

Answers

December 22, 2014
EricM
We apologize but this master cylinder does not come with the gasket, boot or grommet where the push rod goes thru. With the various setups this master cylinder is used for there would be several to match each need. Your local parts store in their “Help” aisle should be able to supply the needed one.
1 answers

can dot 5 brake fluid be used in this master cylinder

mod47
Willmar, MN, USA
August 17, 2014

can dot 5 brake fluid be used in this master cylinder

Answers

August 18, 2014
EricM
No we do not recommend this for use with DOT 5 fluid. We recommend DOT 3 or DOT 4 fluid.
1 answers

do you have any instructions for this master cylinder?

DaveL
Cheyenne, WY, USA
August 02, 2014

do you have any instructions for this master cylinder?

Answers

August 05, 2014
EricM
Sorry this master cylinder does not come with printed instructions but if in doubt our techs will be glad to assist with any questions. This is a dual reservoir master cylinder. The port furthest from the mount flange is for the front brakes. Included are two plugs for the side not used on the master cylinder. If using for manual brakes it is ready for installation and if for power brakes then you must install the included slug (or cylinder) into the piston to convert from a deep bore to a shallow dish. Not doing so will result in extreme pedal travel and likely no brakes. There is a bleeder kit used to bench bleed the master cylinder and it is imperative that it is thoroughly bench bled. Once installed bleed the brakes as normal and repeat if you have a spongy pedal.
1 answers

Where does the pin or slug go? Do you take out the piston on the master cylinder, put the slug in than the piston? Master cylinder 910-31445. Got power disc brakes all four corners.

DaveL
Cheyenne, WY, USA
August 01, 2014

Where does the pin or slug go? Do you take out the piston on the master cylinder, put the slug in than the piston? Master cylinder 910-31445. Got power disc brakes all four corners.

Answers

August 04, 2014
EricM
The master cylinder comes with a deep bore piston for the push rod on manual brakes. If using on power brakes the slug (spacer) that comes with the master cylinder is inserted into the deep bore of the piston to convert it to a slight dish. If not installed it will take a lot of pedal travel and in some cases all the way to the floor before you get any brakes if even then.
1 answers

Will this fit in my 55 Buick special Mc is under the floor, 4 wheel drum, upgrading to disk/drum Manual.. Unless I can find an inexpensive remote booster..

55Buick
Plantersville, TX 77363, USA
July 17, 2014

Will this fit in my 55 Buick special Mc is under the floor, 4 wheel drum, upgrading to disk/drum Manual.. Unless I can find an inexpensive remote booster..

Answers

July 17, 2014
EricM
The mounting holes are 3.38" from center to center and it is 5 1/2" long. Compare these dimensions to your requirements to verify fit.
1 answers

Ref Item # 91031445 In the description, you mention an adaptor pin to plug the deep hole in the master cylinder. Can I order this part separately? I plan on ordering various parts such as a proportioning valve and various brake fittings and would like to include this with my online order.

1939Driver
Pflugerville, TX
April 16, 2014

Ref Item # 91031445 In the description, you mention an adaptor pin to plug the deep hole in the master cylinder. Can I order this part separately? I plan on ordering various parts such as a proportioning valve and various brake fittings and would like to include this with my online order.

Answers

April 16, 2014
EricM
Sorry I do not offer the pin or plug separately. They come with the master cylinder only.
1 answers

Do I need to buy a residual valve to use this on a front disc/rear drum setup if Im just replacing my master with this one on my booster I currently have stock disc/drum setup on my 71 camaro. Im switching to C5 corvette brakes front and keeping stock rear drums for now

Chrisalanwarren
Phelan
April 08, 2014

Do I need to buy a residual valve to use this on a front disc/rear drum setup if Im just replacing my master with this one on my booster I currently have stock disc/drum setup on my 71 camaro. Im switching to C5 corvette brakes front and keeping stock rear drums for now

Answers

April 08, 2014
EricM
With drum brakes it is always best to use a 10 pis residual valve to keep the the spring tension that is on the shoes from forcing fluid back up to the master cylinder. Since your master cylinder is mounted up higher than the front brakes then it would not be necessary to run a residual valve on the front but if you want to it will not hurt anything if you used a 2 psi there.
1 answers

69 Mustang 4 wheel disc conversion My Mustang has one of your Mustang II kits with the GM style front discs. I changed the rear drums to discs from an 01 Crown Victoria. The original master cylinder has a bore of 1" and the stroke is 9/16". Will the added 1/2" of stroke on this corvette style cylinder make a difference? The brakes are power.

Hulajoe
Hawaii
February 28, 2014

69 Mustang 4 wheel disc conversion My Mustang has one of your Mustang II kits with the GM style front discs. I changed the rear drums to discs from an 01 Crown Victoria. The original master cylinder has a bore of 1" and the stroke is 9/16". Will the added 1/2" of stroke on this corvette style cylinder make a difference? The brakes are power.

Answers

March 03, 2014
EricM
The amount of stroke will not change much because once the air is bleed out of the system the master cylinder stroke will typically be less than 1/4" from at rest position to a "panic stop" amount of brake pedal pressure.
Page 1 of 3

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