Product Summary

Firewall Position, Drum Brake System Type, Natural

  • OEM type single reservoir master cylinder
  • 55-66 Chevy applications with original drum brakes
  • Not for disc brake applications
  • 7/16" IFF outlet
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Key Specs

MFG. Part #91031416
BrandSpeedway Motors
Master Cylinder Bore Size1 Inch
Master Cylinder MaterialCast Iron
FinishNatural
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Need To Know

Quick and Easy Returns

Return Policy

Speedway Motors 91031416 Details

This is an OEM type single reservoir master cylinder for many 1955-1964 Chevy applications with original drum brakes. Has a 1" bore and a 7/16"-24 IFF outlet port. Not for use with disc brakes.

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

Catalog Correction: This unit has a 7/16" outlet, not a 3/8" port as stated in our catalogs.

Specs

  • 7/16"-24 IFF outlet
  • Bolt spacing for attachment is 3.390 or 3-3/8”
  • Piston has a 1-5/8” dish or bore for the pushrod
  • Overall Length:  5-7/8"

Speedway Motors 91031416 Specifications

KEY SPECS
MFG. Part #91031416
BrandSpeedway Motors
Master Cylinder Bore Size1 Inch
Master Cylinder MaterialCast Iron
FinishNatural
GENERAL
PositionFirewall
Brake System TypeDrum
Outlet CountSingle
Reservoir TypeIntegral
Reservoir IncludedYes
Outlet Fitting7/16"-24 IFF
Mounted Length5.88"
Centerline of Holes3.38"
Sold in QuantityEach
NotesNot for use with disc brakes. PLUG 9103186 3/8-24 IFM

Ratings & Reviews

3.3

4 Reviews

Overall Assessment

The product seems to be a high-quality master cylinder that matches the original in design. Customers have noted its great fit and resemblance to their older models. Some customers, however, experienced issues with product compatibility. It seems there might be issues with the advertized inlet port size, which can cause inconvenience for users when they need to find replacements. Also, there's a dual outlet design, inconveniencing those searching for a direct one-outlet replacement. In spite of these, a client confidently recommended our product, as it fit well into their mechanism. Our master cylinder has consistently performed well, earning us reliable and returning customers.

3.2

4 reviews

5

1

4

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3

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0

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Filter by Ratings

2 outlets instead of one, not a stock replacement

1.0

5 years ago

Adam

Columbus Oh

It looks like the original master cylinder I took off but there are 2 outlets instead of one, and I cannot find a 1/4 MNPT plug with which to plug the second outlet, pretty frustrating. I've attached a photo, the second port is on the front of the master cylinder.

Would Not Recommend

Part did not fit my mule drawn wagon.

3.0

5 years ago

Geguinn

Graham TX

Verified

The master cylinder was exactly as described, unfortunately it did not fit the set up on our mule drawn wagon that I needed it to replace! Since there was no return, I left it with the garage that did the repair and had to purchase another one that did fit!

Would Recommend

i would buy again

5.0

5 years ago

charlie boy

penn yan,ny

Verified

it fit just like the old one !

Would Recommend

Master Cylinder

4.0

16 years ago

Smitty

Yantis Texas

Verified

The ad for this master cylinder shows it as a 3/8" inlet port when it is a 7/16". This isn't a big problem but considering I live in the Boonies I can't get a 7/16" Male inverted flare to a 3/8" Female inverted flare without reordering. I got the complete brake line and fittings from you. Over the years this is the fourth set of brake lines I've got from you, and the first problem. Send me one if you can.

Would Recommend

Showing 4 of 4 reviews

Questions & Answers

3 Questions • 3 Answers

do you sell the spud as your tech described it in the video to attach this to a booster

by chevy

• 8 years ago

1 answer

do you sell the spud as your tech described it to attach this to a booster

by 57chevtruck

• 8 years ago

1 answer

Does this come in chrome

by mike

• 10 years ago

1 answer

3 of 3 questions shown

Fitment

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