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#91031321
$52.99
/each
On Backorder
This part is Backordered. We estimate this item will ship on or before November 11th.
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Universal Fit, Firewall Position, Tandem Outlet Count
| MFG. Part # | 91031321 |
| Brand | Speedway Motors |
| Master Cylinder Bore Size | 1 Inch |
| Master Cylinder Material | Cast Iron |
| Finish | Natural |
Need help?
855.313.9176Quick and Easy Returns
Return PolicyUniversal GM Corvette style cast iron master cylinder with a 1" bore size. Compatible with Disc/Drum or Disc/Disc. Includes a piston adapter that will allow for power or manual brake systems.
Has 9/16" and 1/2" ports on both sides of the master cylinder.
Learn more about selecting the proper master cylinder for your vehicle by reading our tech article. Brake System Selection.
Guides & Documents
CA WARNING:
Can expose you to lead, a carcinogen and reproductive toxicant. See www.P65Warnings.ca.gov
| KEY SPECS | |
|---|---|
| MFG. Part # | 91031321 |
| Brand | Speedway Motors |
| Master Cylinder Bore Size | 1 Inch |
| Master Cylinder Material | Cast Iron |
| Finish | Natural |
| GENERAL | |
| Position | Firewall |
| Brake System Type | Disc/Drum |
| Outlet Count | Tandem |
| Reservoir Type | Integral |
| Reservoir Included | Yes |
| Outlet Fitting | 1/2"-20 IFF |
| Outlet Fitting 2 | 9/16"-18 IFF |
| Overall Width | 4.38" |
| Overall Height | 5" |
| Mounted Length | 8.13" |
| Centerline of Holes | 3.25" |
| Sold in Quantity | Each |
| Notes | 9103188 port plug kit |
4.7
57 Reviews
Customers rate our product positively for its reliable performance, high-quality materials, ease of installation, and practical versatility. It has proven effective in a variety of applications, from street rods to classic car restorations, due to its flexible fittings and compact design. Regardless of make or model, this master cylinder enhances braking power and gives a firm, secure pedal feel. Issues, like a leaky lid or the occasional defective unit are rare. Some customers wish there were clear instructions on how to choose the best paint for it. However, users recommend the product for its superior function over competitors, affirming customer satisfaction and trust in our product's performance.
4.7
57 reviews
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Most Liked Positive Review
5.0
Dual Port Master Cylinder
This is the perfect master Cylinder for all Hot Rods that have frame mounted master cylinder ,with Ports on Both sides of the cylinder it can be used in many configurations , I used it on 3 of my Hot Rods , 55 Ford Truck,39 Ford Coupe ,32 Ford Coupe , Works great , I had a hard time finding the one with dual ports until I called Speedway Tech Line and got correct part number !!! Thanks Speedway you go me Going and Stopping !
Most Liked Negative Review
3.0
I bought this product to replace a new one that was defectiv
I had purchased a power steering kit from Speedway a few months ago and the master cylinder was defective. I needed it quick so I just bought it outright because there customer service jerked me around on the last defective item I tried to replace. This one worked.
Filter by Ratings
Great product
5.0
3 months ago
Ron
Leavenworth Ks
Verified
Great replacement for my stock master cylinder in my 1963 Chevy Impala when converting to disc on the front.
Would Recommend
Yes
5.0
7 months ago
Chuck Leckbee
Odessa tx
Verified
It replaced a single bowl , worked great
Would Recommend
I have purchased several of them
5.0
11 months ago
Parts changer
Dallas Tx.
Verified
It looks great and fit properly. Everything is good again. Highly recommend.
Would Recommend
Definitely would buy again
5.0
a year ago
Louis
Ky
Verified
Fitment was great. Got me back on the road quickly and w/o issues.
Would Recommend
Yes I would buy again
5.0
a year ago
Louis
Ky
Verified
Great quality. Easy install.
Would Recommend
I bought this product to replace a new one that was defectiv
3.0
a year ago
Tom
Florida
Verified
I had purchased a power steering kit from Speedway a few months ago and the master cylinder was defective. I needed it quick so I just bought it outright because there customer service jerked me around on the last defective item I tried to replace. This one worked.
Would Recommend
Speedwaymotors.com is the best
5.0
a year ago
Bstill
Kalispell MT
Verified
I was both happy and surprised that a defective product bought 2 years ago and out of warranty (it was really only 2 months of use, I just finished the build) was replaced no charge. This is an example of true customer service. Thanks for doing business with integrity.
Would Recommend
Yes, Would Buy this Product again.
5.0
a year ago
Bob
Fargo, ND
Verified
Worked Great ... Out of the Box.
Would Recommend
Solid part
5.0
a year ago
Old Chevy
Scottsdale, AZ
Verified
This master cynlinder is solidly built and works perfect within my 62 Chevy.
Would Recommend
Better than rebuilding old one for sure.
4.0
a year ago
Phil
Illinois
Verified
Great overall functional replacement. Bench bleeding kit , which was included was a plus!
Would Recommend
Showing 10 of 57 reviews
14 Questions • 12 Answers
On a disc/disc application do I need to use a proportioning valve?
by Steve G
• 2 years ago
1 answer
View Answer
With front and rear discs, using the same calipers and pads on all 4 wheels, which port should be used for front and which for rear?
by Albert
• 7 years ago
1 answer
View Answer
I have a 50 pontiac streamliner that I plan on putting this master cylinder in. I plan on using the 10 psi residual value in the front and rear brake lines. Will I need to put in a proportioning valve in either Line ? Also what are the part numbers of the adapters that I will need to get from the master cylinder to the proportioning value. I will also need the adapter for the export end of the residual value to the stock line. Line dia is 3/16 Finally I would like to get a rubber boot to cover the end of the master cylinder since it will sit under the floor of the car.
by Jack
• 7 years ago
1 answer
View Answer
After everything has been bled out what is the correct level of fluid you should have in the master cylinder.
by BigBear
• 9 years ago
3 answers
View Answers
I am on my second master cylinder from your store. I have replaced calipers, brake lines front to rear with premade line, bless lines several times. I have no leaks anywhere. When I let set for about a minute and press the brakes they go to the floor. 2 pumps and I have pressure, can hold and does not move, solid brake. Release pressure for a minute and back to the floor. I have a booster, small one, could this be the problem, I am at wits end with these brakes, disk front and rear, don't know what else to try.
by john
• 11 years ago
1 answer
View Answer
Will this master cylinder need a proportioning valve, front disk rear drum?
by Jabo
• 12 years ago
1 answer
View Answer
Which port goes to the front bakes?
by 36guy
• 13 years ago
1 answer
View Answer
Will stock Ford pushrod work? Does the pushrod thread into the bore? If so, what is the thread pattern?
by AnnabelLee
• 13 years ago
1 answer
View Answer
Will this work with a manual disc/disc application? I have heard a residual valve in the master cylinder will not work for disc brakes.
by
• 14 years ago
1 answer
View Answer
Would this work with drum/drum early ford brakes?
by
• 15 years ago
1 answer
View Answer
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