Clutch and Small Brake Master Cylinder, 3/4 Inch Bore, Dot 3 & 4

#91025680

Clutch and Small Brake Master Cylinder, 3/4 Inch Bore, Dot 3 & 4

Name: Clutch and Small Brake Master Cylinder, 3/4 Inch Bore, Dot 3 & 4
Brand: Speedway Motors
SKU: 91025680
Price: 80.99 USD
Availability: InStock
Rating: 4.9 (43 reviews)

43 Reviews

17 Questions

3/4" bore size works well with many release bearings and slave cylinders
3/8"-24 inverted flare fluid outlet fitting allows common 3/16" brake lines to be connected
Includes 5/16"-24 thread pushrod to connect to a pedal assembly or clevis

$80.99

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Product Summary

Universal Fit, 0.75" Bore Size, 8.00" Overall Length

3/4" bore size works well with many release bearings and slave cylinders
3/8"-24 inverted flare fluid outlet fitting allows common 3/16" brake lines to be connected
Includes 5/16"-24 thread pushrod to connect to a pedal assembly or clevis
Lightweight and compact design makes it easy to fit into tight spaces
Works with pedal assembly part numbers 83534013833, 83534013834, 83534013574 and more

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Key Specs

MFG. Part #	91025680
Bore Size	0.75"
Overall Length	8.00"
Centerline of Holes	2.25"
Outlet Fitting	3/8"-24 IFF

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Speedway Motors 91025680 Details

Lightweight, space-saving alternative to full size master cylinders
Fits popluar clutch and small brake applications
3/4-inch bore
3/8-24 inverted flare fitting included
1.4 oz. fluid reservoir
5/16-24 threaded pushrod

The Perfect Solution For Your Hydraulic Clutch Conversion

Ditching your ancient mechanical clutch linkage provides much needed room for custom exhaust, long tube headers, and more. Even engine swaps can often create issues with trying to reuse the factory clutch pivot linkages, as there is no longer a engine block provision for your clutch linkage. Upgrading to a hydraulic clutch solves all of these issues and provides a better, easier to modulate clutch pedal feel as well!

Learn more about selecting the proper master cylinder for your vehicle by reading our Toolbox article on Master Cylinder Bore Size Selection.

Application

• Clutch Applications
• Small Brake Applications

CA WARNING:

Can expose you to lead, a carcinogen and reproductive toxicant. See www.P65Warnings.ca.gov

Speedway Motors 91025680 Specifications

KEY SPECS
MFG. Part #	91025680
Brand	Speedway Motors
Bore Size	0.75"
Overall Length	8.00"
Centerline of Holes	2.25"
Outlet Fitting	3/8"-24 IFF
Thread Pitch	5/16"-24
Material Type	Aluminum
Finish	Natural

GENERAL
Reservoir Size (oz)	1.4
Sold in Quantity	Each
Notes	REPLACEMENT CAP: 83533016239

Ratings & Reviews

4.9

43 Reviews

Overall Assessment

Customers commend the product for its affordability, quality, and functionality, underscoring its practicality for various vehicle models and builds, including kits and modified projects. It outperforms similar, more costly products like the Wilwood master, fitting nicely and working flawlessly due to its compactness and easy installation process. Users recognize the precise fitment in exact replacement situations as excellent, ensuring smooth operation. One isolated case of internal breakage was reported. Overall, most customers would recommend this product due to its high performance and value-for-money quality.

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4.9

43 reviews

Most Liked Positive Review

5.0

excellent.....straight forward

did exactly what i needed for the job

Most Liked Negative Review

1.0

Broken internally

I'm at the point of bleeding the brake and clutch systems. Tried pumping the clutch pedal with no result. Broke the lines and still no fluid. Tried to disassemble to see if something was wrong with the piston but once you have the snap ring and rod rwmoved, the piston won't come out. Reinstalled and tried vacuum priming. It filled the lines but the first pump locked the system and vacuum wouldn't pull anymore fluid. Scrap.

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Sort Reviews

Great product

5.0

a month ago

Johnny B27

Eau Claire wi

Verified

Worked great on my 27 T for the hydraulic clutch.

Would Recommend

Same size of install mounting

5.0

a month ago

Timex

Canada

Verified

Master worked great but had to modify the connector to my pedal.

Would Recommend

Good quality product

4.0

2 months ago

Bass4u

Omaha, Ar

Verified

This looks very good and I'm sure it will work for me when I get it installed

Would Recommend

yes I bought it before and I did buy it again

5.0

a year ago

rick

bradenton, fl

Verified

haven't installed it yet but will in the near future as this build is not completed that far yet

Would Recommend

Great deal

5.0

a year ago

C10

Monterey tn

Verified

Instead of the $300 kit from other places this slave cyl. Saved me money buy as a kit though because finding the fitting is a nightmare.

Would Recommend

I would buy again

5.0

a year ago

68 Camaro

Norfolk, NE

Verified

Worked great. Fit corrected. Problem solved!!

Would Recommend

For sure

5.0

2 years ago

Ellie

Central City Nebraska

Verified

Very easy bolt on

Would Recommend

Yes

5.0

2 years ago

June bug

Eden nc

Verified

On my Race car Asphalt Modified

Would Recommend

Quality parts great customer service fast delivery

5.0

2 years ago

Lee

Ellensburg, Washington

Verified

My service quality parts, fast delivery time I would highly recommend speedway motors, call my friends

Would Recommend

Works perfectly with the 7/8 bore push type slave

5.0

2 years ago

606guy

Verified

System was very quick and easy to bleed, and I think this was because the outgoing fluid location.

Would Recommend

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Questions & Answers

17 Questions • 10 Answers

Sort Questions

Do you have this same product with a remote fluid resevoir? The placement needed for my application makes filling very difficult...

by Natasha

• 2 years ago

1 answer

View Answer

Will this work for a centerforce dual friction clutch on a chevy 348? The slave is a 1in bore.

by Max

• 7 years ago

1 answer

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Does this just use standard brake fluid or a certain dot number?

by Keifs10farm

• 7 years ago

1 answer

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Will this master cylinder work with the Speedway hydraulic release bearing P/N: 91025610 on a Muncie 4 speed?

by Tut

• 7 years ago

1 answer

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will this work on any external slave cylinder?? i was thinking of using a early 60s 2 ton chevy truck slave..what will the pedal pressure be like? THINKING OF USING IT TO CONVERT A TOPLOADER TRANS ON A OLD FALCON thank you do you have other suggestions ? do you have salve cylinders i can make a bracket for? Lonnie

by red1952ford

• 8 years ago

1 answer

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What is the total travel distance of the push rod on the #91025680 master cylinder?

by Greg

• 8 years ago

1 answer

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Good morning: Question: I have a Speedway Clutch Master Cylinder 91025680 , Need a fitting from 3/8 24 IFM to a AN3 Straight fitting Q&A had a # 6174030 but was AN4 Need a AN3 size Please help. Thank you JimJ

by JimJ

• 9 years ago

1 answer

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Hello. What is the length of the unit from the mounting holes to the end of the unti by the reservoir. Thanks

by Rob

• 10 years ago

1 answer

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Will this MC be damaged if full travel of the cylinder is used as the stop for the clutch pedal?

by John

• 10 years ago

1 answer

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Is there a clutch master cylinder kit available for it? The rod that screws onto my pedal bent and I need to replace it with a new one.

by 08StreetStock

• 11 years ago

1 answer

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