1955-57 Chevy Car Disc/Drum Brake Booster Master Cylinder Combo
1955-57 Chevy Car Disc/Drum Brake Booster Master Cylinder Combo
Speedway Motors

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#91035556

1955-57 Chevy Car Disc/Drum Brake Booster Master Cylinder Combo

  • Kit contains a 1" bore master cylinder with 1/2"-20 and 9/16"-18 outlets, 8" dual diaphragm booster, and a disc/drum combination valve
  • Also includes line to connect the prop/metering block to the master cylinder and the necessary hardware to mount the booster to your original 55-57 Chevy brake pedal
  • Measures 14-1/4" from firewall bracket to end of master cylinder
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$349.99

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Product Summary

55-57 Chevy, Disc/Drum Brake System Type

  • Kit contains a 1" bore master cylinder with 1/2"-20 and 9/16"-18 outlets, 8" dual diaphragm booster, and a disc/drum combination valve
  • Also includes line to connect the prop/metering block to the master cylinder and the necessary hardware to mount the booster to your original 55-57 Chevy brake pedal
  • Measures 14-1/4" from firewall bracket to end of master cylinder
  • Includes proportioning/metering valve with bracket to bolt directly to master cylinder
  • Upgrades the brake system on your Tri-5 Chevy car to match upgraded disc brakes
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Key Specs

MFG. Part #91035556
BrandSpeedway Motors
Brake System TypeDisc/Drum
Brake Booster Diameter8 Inch
Master Cylinder MaterialSteel
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Speedway Motors 91035556 Details

When you put modern front disc brakes on your 55-57 Chevy car, you should update the master cylinder as well. The stock 55-57 drum brake master cylinder does not have the capacity to supply the proper amount of pressure for front disc brakes. This simple bolt-on power brake assembly will ensure your brakes are operating at peak performance.

  • Kit contains a 1" bore master cylinder with 1/2"-20 and 9/16"-18 outlets, 8" dual diaphragm booster, and a disc/drum combination valve (provides proportioning and metering).
  • Also includes line to connect the prop/metering block to the master cylinder and the necessary hardware to mount the booster to your original 55-57 Chevy brake pedal.
  • Measures 14-1/4" from firewall bracket to end of master cylinder.
  • Includes proportioning/metering valve

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

 

Installation Instructions

Speedway Motors 91035556 Specifications

KEY SPECS
MFG. Part #91035556
BrandSpeedway Motors
Brake System TypeDisc/Drum
Brake Booster Diameter8 Inch
Master Cylinder MaterialSteel
GENERAL
Brake Booster TypeVacuum Diaphragm Dual
Outlet CountTandem
Master Cylinder Bore Size1 Inch
Brake Booster MaterialSteel
Mounted Length14.25"
Master Cylinder Port Sizes1/2"-20 & 9/16"-18 IFF
Bolt Hole Pattern3.38" x 3.38"
Centerline of Holes3.38"
Proportioning Valve IncludedYes
Reservoir IncludedYes
Sold in QuantityKit
NotesIncludes master cylinder, booster, and proportioning valve.

Ratings & Reviews

4.8

30 Reviews

Overall Assessment

Customers are generally satisfied with the product, often utilized for upgrading classic cars, boasting of its good quality, easy installation, and excellent fit. The master cylinder's ability to enhance safety, especially at freeway speeds, is praised. A common critique is the lack of instructions, leading some customers to suggest that the company consider adding detailed tutorials. Others share useful tips for the installation process. There are a few reports of needing minor adjustments for the product to fit perfectly, but overall, customers assert that the product is worth the purchase for its performance and cost-effectiveness.

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4.8

30 reviews

5

25

4

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I will buy this brake combo. Again.

5.0

3 months ago

Lou

Berkeley

Verified

This master combo worked out great everything fit like it's supposed to.

Would Recommend

Nice kit

4.0

a year ago

Franklin

Ohio

Verified

I haven't had the time to install it yet, but it looks like a nice kit. Wish it wasn't so much more expensive than the other kit when the only difference seems to be the piston in the master cylinder.

Would Recommend

Speedway's help in updating my classic's braking was great.

5.0

4 years ago

LarryWeg

Durango CO

Verified

It's nice to be able to update a classic car with a split master cylinder.

Would Recommend

Yes.

5.0

4 years ago

Dave

Gretna, Ne

Verified

No instructions came with it? Took pictures as I took off old and had a reference to put new on.

Would Recommend

I would buy again

5.0

5 years ago

Smokey

Wichita Ks

Verified

Working great, fit was good

Would Recommend

I would buy again from speedway!

5.0

5 years ago

Dollar bill

Oak Forest Illinois.

Verified

Product worked as expected

1957 chevy power disk brakes

5.0

5 years ago

big door

peoria az.

Verified

i just came back from a test run on my new speedway powder disk brakes i put on my 57 chevy i feel much safer now at freeway speeds

Would Recommend

Quality product that could use some directions

4.0

6 years ago

62 Challenge

Scottsdale, AZ

Verified

Recommendation: consider adding some instructions either within the kit or on your website via video.

Would Recommend

Everything in kit looks to be good quality.

5.0

6 years ago

J.R.

Union Valley,vTX.

Verified

Haven't installed it yet.

Would Recommend

Nice

5.0

6 years ago

Jkrahn

Chilton Wisconsin

Verified

Used on my 55 Chevy

Would Recommend

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Questions & Answers

14 Questions • 11 Answers

Is there a way to order this kit with your aluminum master cylinder, rather than the steel/iron one?

by Paul

• 3 years ago

1 answer

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Is there any difference between a disc/drum and disc/disc master cylinders on your kits or is the proportional is the difference. Tks in advance.

by mike

• 8 years ago

1 answer

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do i need a 10 lb residual valve on the drum side or is it built into the master cylinder for the rear drum brakes?

by Chris

• 9 years ago

1 answer

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do you carry premade brake lines from the brake master cylinder to the proportional valve for this product application ,? if yes could you please tell me your product number P.S - I find the tech help on Speedway.com to be the Best Ever!!..Very Much Appreciated! ty

by Shadow

• 9 years ago

1 answer

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Do you sell the master cylinder for this kit separately, should I ever need a replacement? Thanks.

by Tim

• 9 years ago

2 answers

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I installed this on my 56. The first pump was hard but heard a pop and from then on the pedal seems too easy to push even with car off. While driving the first press of the pedal seems somewhat soft but when you press again even softer and not much braking power. Brakes are completely bleed. Is there a problem with the booster causing it to lose vacuum or bleed off somehow? Should I exchange it?

by Bonechip

• 10 years ago

1 answer

View Answer

Brakes lock up as i drive I recently purchased and installed this kit on my 57 chevy. I used this booster kit with your disc brake conversion kit for 57 chevy. When i drive a few miles my brakes lock up. The brake feels higher as i go but eventually locks up. If i let the car sit they release. What could be the problem? Someone told me there could be a check valve in the new master cylinder, or my new booster could be bad.

by jmccann

• 12 years ago

1 answer

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HOW LONG IS THE WARRANTY?

by PMOORE

• 12 years ago

1 answer

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will the master/booster combo be mounted level or at an angle? I would like to have the master/booster assy mounted level and not sitting at an angle where the master is higher. Are brackets available for this combo?

by keikoyuki

• 12 years ago

1 answer

View Answer

Difference between 91035556 and 91035557 Pictures look the same.....I want the combination for front disc and rear drum master cylinder and booster Also see that most kits that others sell have a combination proportioning valve and these unit has a inline dial. Do you have the combination proportioning valve for sale?

by Alton

• 12 years ago

1 answer

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