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#91031412
Dual 7 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
- Compact for installation under floor or on firewall of almost any vehicle
- NEW booster measures 7" in diameter
- Master cylinder has a 1 1/8" bore with 3/8"-24 IFF outlets on both sides of the master cylinder
$257.99
/kit
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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 measures 7" in diameter
- Master cylinder has a 1 1/8" bore with 3/8"-24 IFF outlets on both sides of the master cylinder
- Booster bolt pattern is four bolts on 3 3/8" centers which fits a variety of brackets and pedal assemblies
- New parts make installation cleaner and easier
Comes as a Kit
View Kit Components
Key Specs
| MFG. Part # | 91031412 |
| Brand | Speedway Motors |
| Brake Booster Diameter | 7 Inch |
| Master Cylinder Material | Steel |
Need To Know
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Return PolicySpeedway Motors 91031412 Details
Speedway Motors 91031412 Details
Compact 7" dual diaphragm booster assembly for installation under floor or on firewall of almost any vehicle. Cast iron master cylinder has a 1-1/8" 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
- 5" thick from master cylinder mount to firewall face
- 4" long firewall mount face to end of pushrod
- 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 91031412 Specifications
Speedway Motors 91031412 Specifications
| KEY SPECS | |
|---|---|
| MFG. Part # | 91031412 |
| Brand | Speedway Motors |
| Brake Booster Diameter | 7 Inch |
| Master Cylinder Material | Steel |
| GENERAL | |
| Brake Booster Type | Vacuum Diaphragm Dual |
| Outlet Count | Tandem/Both Sides |
| Outlet Fitting | 3/8"-24 |
| Master Cylinder Bore Size | 1-1/8 Inch |
| Brake Booster Material | Steel |
| Overall Length | 13.5" |
| 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 |
| Notes | 9103190 STEEL PORT PLUG KIT. |
Ratings & Reviews
4.9
17 Reviews
Our product consistently receives high praise for its quality, usability, and superior braking performance compared to competitors. According to customers, it has been successful in improving overall braking by 100%, further enhancing vehicle safety. Its adaptability is also noted, fitting well in various car models from a 1966 f100 to a 1930 model A. Many have found the installation process easy and appreciate the value for the price. They also commend the reduced pedal travel, stating it results in superb braking. The knowledgeability of our technicians has been highly noted, further supporting customers in their choice. It's the recommended solution for braking problems, reinforcing its superiority over competitors.
Ratings & Reviews
4.9
17 Reviews
Our product consistently receives high praise for its quality, usability, and superior braking performance compared to competitors. According to customers, it has been successful in improving overall braking by 100%, further enhancing vehicle safety. Its adaptability is also noted, fitting well in various car models from a 1966 f100 to a 1930 model A. Many have found the installation process easy and appreciate the value for the price. They also commend the reduced pedal travel, stating it results in superb braking. The knowledgeability of our technicians has been highly noted, further supporting customers in their choice. It's the recommended solution for braking problems, reinforcing its superiority over competitors.
4.9
17 reviews
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Filter by Ratings
I am very happy with this product and the price and fast del
5.0
a year ago
Happy camper 71
Houghton Michigan
Verified
The product works great with no problems at all.
Would Recommend
Great quality
5.0
2 years ago
Amber
Wisconsin
Verified
Great quality part. Unfortunately I had to send part back because speedway doesn't carry the push rod eyelet I need for my vehicle and I can not find one anywhere on line. Speedways return process is simple and my refund was quickly processed.
Would Recommend
Works great really made a difference !!!!!!!$1$
5.0
4 years ago
Fat Fendered Ford
Galveston Texas
Verified
Improved overall braking by 100%
Would Recommend
I would buy this product again, and recommend to a friend
5.0
4 years ago
Flatiron
Oklahoma
Verified
I adapted this booster to my 1966 f100, to clear the Mercury script valve covers on my ford FE engine
Would Recommend
Great product, I would purchase it again
5.0
5 years ago
Mike
South Hadley, MA
Verified
This just what I need for my rat rod that I'm building.
Would Recommend
I would recommend this product
4.0
5 years ago
Rodguy
Montana
Verified
Good price,good value,easy to install
Would Recommend
Ordering made EZ
5.0
5 years ago
GW
Tucson
Verified
Phone sales made easy. Very respectful and knowledgeable representatives.
Would Recommend
Great product
5.0
5 years ago
Gary
Tx
Verified
I used this master cylinder and brake booster on a 1930 model A. It worked great and fit under the floor of the car
Would Recommend
Excelent booster and master cylinder
5.0
6 years ago
Louie Louie
Madison, WI
Verified
selected larger bore size to reduce pedal travel, and utilized dual booster to offset any perceived additional pedal pressure. Provided excellent results, hard pedal, reduced pedal travel, superb braking. Adjustment of booster to cylinder push rod clearance of .020 to .023 is critical. Too little clearance and brakes will drag. Too much and pedal will be low. Some use clay, but I recommend a tool available specifically designed to measure this dimension.
Would Recommend
I purchased a barke pedal, booster, master cylinder assembly
5.0
6 years ago
Robert
Kansas City, Mo.
Verified
My brake pedal assembly was very well fabricated, the finish was excellent, it fit perfectly, and was competitively priced. What more could you want?
Would Recommend
Showing 10 of 17 reviews