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#91031413
Dual 8 Inch Brake Booster Master Cylinder Combo, 1 Inch Bore
- Compact for installation under floor or on firewall of almost any vehicle
- NEW booster measure 8" in diameter
- Master cylinder has a 1" bore with 3/8"-24 IFF outlets on both sides of the M/C
$194.99
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Product Summary
Universal Fit, Vacuum Diaphragm Dual Brake Booster Type
- Compact for installation under floor or on firewall of almost any vehicle
- NEW booster measure 8" in diameter
- Master cylinder has a 1" bore with 3/8"-24 IFF outlets on both sides of the M/C
- Four bolts on 3 3/8" centers
- Pushrod-to-mounting flange is 5-1/2"
Comes as a Kit
View Kit Components
Key Specs
| MFG. Part # | 91031413 |
| Brand | Speedway Motors |
| Brake Booster Diameter | 8 Inch |
| Master Cylinder Material | Steel |
| Master Cylinder Finish | Natural |
Need To Know
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Return PolicySpeedway Motors 91031413 Details
Speedway Motors 91031413 Details
Compact 8" dual diaphragm booster assembly for installation under floor or on firewall of almost any vehicle. Cast iron master cylinder has a 1" bore and is suited for disc-disc or disc-drum combinations.
Master cylinder features two 3/8"-24 inverted flare ports on each side (plugs are included for ports not in use).
Learn more about selecting the proper master cylinder for your vehicle by reading our tech article. Brake System Selection.
Specs
- Pushrod-to-mounting flange is 5-1/2"
- Four bolts on 3-3/8" centers
- Pushrod stud is 3/8" fine thread
- (4) qty 3/8"-24 outlet ports (2 plugs included)
- 8" from mount to outer edge
Speedway Motors 91031413 Specifications
Speedway Motors 91031413 Specifications
| KEY SPECS | |
|---|---|
| MFG. Part # | 91031413 |
| Brand | Speedway Motors |
| Brake Booster Diameter | 8 Inch |
| Master Cylinder Material | Steel |
| Master Cylinder Finish | Natural |
| GENERAL | |
| Brake Booster Type | Vacuum Diaphragm Dual |
| Outlet Count | Tandem/Both Sides |
| Outlet Fitting | 3/8"-24 |
| Master Cylinder Bore Size | 1 Inch |
| Brake Booster Material | Steel |
| Brake Booster Finish | Zinc |
| Overall Length | 13.25" |
| Master Cylinder Port Sizes | 3/8"-24 IFF |
| Bolt Hole Pattern | 3.38" x 3.38" |
| Centerline of Holes | 3.38" |
| Reservoir Included | Yes |
| Sold in Quantity | Kit |
Ratings & Reviews
4.8
11 Reviews
Customers highly rate the product, noting its quality and effectiveness. Many mention it fitting well in different types of vehicles including a 37 Buick custom and a '56 Fairlane, although some mention modifications needed in unique builds. The power brake booster, in particular, receives praise for enhancing braking capabilities, with one user noting substantial improvement upon upgrading from a 7" to an 8" booster. However, issues with the accompanying master cylinder not fitting all cars are reported. The product is also appreciated for its practicality and safety improvements in transformed vehicles. Understanding initial difficulties, such as a stuck input shaft, would benefit from clearer instructions.
Ratings & Reviews
4.8
11 Reviews
Customers highly rate the product, noting its quality and effectiveness. Many mention it fitting well in different types of vehicles including a 37 Buick custom and a '56 Fairlane, although some mention modifications needed in unique builds. The power brake booster, in particular, receives praise for enhancing braking capabilities, with one user noting substantial improvement upon upgrading from a 7" to an 8" booster. However, issues with the accompanying master cylinder not fitting all cars are reported. The product is also appreciated for its practicality and safety improvements in transformed vehicles. Understanding initial difficulties, such as a stuck input shaft, would benefit from clearer instructions.
4.8
11 reviews
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Filter by Ratings
Dual 8" brake booster Master cylinder combo
5.0
10 days ago
Barney O
ILL.
Verified
works great used a power bleeder for the master cylinder. Only way to go.
Would Recommend
The power booster worked fine no problems .
4.0
4 years ago
Eiiery Queen
Northbrook Il
Verified
The power brake booster worked just fine it fit the car with the kit no problem. The master cylinder that came with it that was supposed to fit the car did not fit at all could not be used wrong part will be returned and then I'll see how well that goes then I would be happy to write a review again. But you did a good job with the power booster it fit the car.
Would Recommend
Great tech help
4.0
4 years ago
Dave
Independence Mn
Input shaft of the booster seemed stuck, I could not move it manually. Called tech and they thought it was ok to attach vacuum to help break it loose. this worked. attached 21 mm hg of vacuum and it took only 13 lbs to move the input shaft. Then I removed vacuum and it took 44 lbs to move. It would be good if there was a note inside the package explaining this issue and how to deal with it. Also the input shaft bellows slips off the nose of the booster too easy, would be better if there was a zip tie holding it on. Bottom line is that it is a good quality unit at a good price. I will comment again after I get the system installed and tested
Would Recommend
This product was used on a 37 Buick custom.
5.0
4 years ago
Goose
Arpin, WI
Verified
Because this was for a modified build on a 37 Buick, we had to modify a few things to make it work, but we knew that before ordering it. Everything turned out awesome.
Would Recommend
i hope not
5.0
5 years ago
i have a Don name not a nick name
new orleans area louisiana
Verified
it was what my vehicle needed
Would Recommend
All parts clevs adapter master brake cylinder power booster.
5.0
6 years ago
Dan the mam
Temple pa.
Verified
Teck had all my questions answered. Each car has its issue but step back think it out .
Would Recommend
Quality part
5.0
8 years ago
J P
Texas
Verified
Replacement for my 36 ford trk
Would Recommend
wow! what a difference.
5.0
9 years ago
millersgarage
Lansing MI
Verified
nice product, as usual. I went with the 8 inch to replace my 7 inch booster, figured why not, got the room. Wow, what a difference. About went thru the windshield at the end of the block.
Would Recommend
Braking News
5.0
9 years ago
Graham
Nanoose Bay B.C.
Verified
All parts were well built and fit below the floor of my 50 chevy truck well. I did have to alter a trans mount / crossmember to get good clearance. But in the end it fits nicely.
Would Recommend
Good parts
5.0
9 years ago
Old man Peabody
Alpena AR
Verified
I've been fighting gremlins in my '56 Fairlane's brakes for a while now. This 8" booster replaced a 7" and did a miracle- it'll nose dive now! My only complaint is that a combo should have needed/matching parts. The master cylinder has no insert to make contact with the booster. I had to make one from a 1/2" bolt. Don't waste your time and money on a 7" booster, get the 8".
Would Recommend
Showing 10 of 11 reviews