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

SAME DAY SHIPPING! Most orders ship within 24 hours.

Specs
Centerline of Holes:
3.38
Material Type:
Steel
Overall Height:
4.75
Overall Width:
4.50
Sold in Quantity:
Each
Finish:
Natural
Mounted Length:
8.00
Bore Size:
1.00
Feed:
Dual
Outlet Fitting:
3/8"-24
Garage Sale:
No
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
Universal Power/Manual Master Cylinder, 1 Inch Bore, Corvette-Style

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Details

Reviews

Q & A

What's in the Box

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 Builder's 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 3.9 out of 5 by 7 reviewers.
RATING BREAKDOWN
7 reviews
5 Stars
4
4 Stars
1
3 Stars
0
2 Stars
1
1 Star
1
RECOMMEND THIS PRODUCT:

Jack48
Verified Purchaser
Ontario, Canada
Product Rating

Brakes

November 06, 2014
The master cylinder worked great on my 1948 Dodge. I needed the larger reservoir because the Dodge has four wheel cylinders on the front.
Yes, I recommend this product.
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Movinon
Verified Purchaser
Mount Desert, ME 04660, USA
Product Rating

Delievered as advertised.

August 23, 2014
Works as intended and as advertised. Thank you Speedway
Yes, I recommend this product.
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dunebuggy
Verified Purchaser
Allen, TX, USA
Product Rating

mounting holes not finished

July 20, 2014
the mounting holes were double drilled leaving a edge in middle of holes that had to be filed to fit.
No, I would not recommend this product.
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retired49
Michigan, USA
Product Rating

must have if you have 4 wheel disc brake

May 24, 2013
I put 4 wheel disc brake on my t bucket and this master cyl is a must have to get them working properly
Pros:
  • Very Well Built
  • Excellent Instructions
Yes, I recommend this product.
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Dewey
Verified Purchaser
Rockford IL.
Product Rating

work good [...]

September 13, 2010
Work good Look good but had a time to get all the air out of the lines
Yes, I recommend this product.
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bestpaint
Verified Purchaser
Product Rating

nice product

March 22, 2015
worked out great having both sides to get lines to.
Yes, I recommend this product.
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Marine
Verified Purchaser
Product Rating

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 1
91031445

Product Q&A

19 questions : 21 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

Which is the front port? In reply to DaveL's question, Eric M. says, "The port furthest from the mount flange is for the front brakes." In reply to Rhurley's question, EricM says, "The outlet closest to the mounting flange is for the front brakes and the outlet furthest from the mounting flange is for the rear brakes." Which one is correct?

Phusch
March 20, 2015

Which is the front port? In reply to DaveL's question, Eric M. says, "The port furthest from the mount flange is for the front brakes." In reply to Rhurley's question, EricM says, "The outlet closest to the mounting flange is for the front brakes and the outlet furthest from the mounting flange is for the rear brakes." Which one is correct?

Answers

March 20, 2015
EricM
The outlet closest to the mount flange is for the front brakes. The outlet furthest from the mount flange is for the rear brakes. Sorry for the confusion.
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

Which resivoir goes to which brakes In the diagram attatchment, its show the rear res going to the front brakes, but that is the smaller of the two. Front front? Rear front? Thanks!

Rhurley
CO
March 12, 2015

Which resivoir goes to which brakes In the diagram attatchment, its show the rear res going to the front brakes, but that is the smaller of the two. Front front? Rear front? Thanks!

Answers

March 13, 2015
EricM
The outlet closest to the mounting flange is for the front brakes and the outlet furthest from the mounting flange is for the rear brakes.
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.
Page 1 of 2

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