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#91031431
Speedway Dual Diaphragm Power Brake Booster, 7 Inch, Black Finish
- Dual diaphragm power booster
- Fits in many tight under-floor installations
- Excellent for '35-'40 Ford
$200.99
/each
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Quantity
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Product Summary
Universal Fit, 5.03" Overall Thickness, Steel, Black
- Dual diaphragm power booster
- Fits in many tight under-floor installations
- Excellent for '35-'40 Ford
- Durable Black powder coated finish
- Get the most stopping power out of your braking system
Key Specs
| MFG. Part # | 91031431 |
| Outside Diameter | 7" |
| Material Type | Steel |
| Finish | Powder Coated |
| Color | Black |
Need To Know
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Speedway Motors 91031431 Details
As featured on Classic Truck’s Week to Wicked. Watch the transformationhere!
- Dual diaphragm power booster
- Fits in many tight under-floor installations
- Excellent for '35-'40 Ford
- Durable black powder coated finish
Learn more about selecting the proper brake booster for your vehicle by reading our tech article.Brake System Selection.
Application
Universal Fitment 3-3/8" Square Bolt Pattern
Only fits 3-3/8" Center to Center Master Cylinder Bolt spacing.
Charts
Booster Tech Tip (GIF)
Guides & Documents
Speedway Motors 91031431 Specifications
Speedway Motors 91031431 Specifications
| KEY SPECS | |
|---|---|
| MFG. Part # | 91031431 |
| Brand | Speedway Motors |
| Outside Diameter | 7" |
| Material Type | Steel |
| Finish | Powder Coated |
| Color | Black |
| GENERAL | |
| Overall Thickness | 5.03" |
| Bolt Hole Pattern | 3.38" x 3.38" |
| Centerline of Holes | 3.38" |
| Brake Booster Type | Vacuum Diaphragm Dual |
| Sold in Quantity | Each |
| Notes | Dual diaphragm booster. |
Ratings & Reviews
5
8 Reviews
Customers are highly satisfied with the 7" Double Diaphragm Booster for its excellent quality, perfect fit, and noticeable difference it makes. Many acknowledge its universal fit and great finish, making it an ideal replacement for failed or incompatible boosters. It's praised for its superior performance compared to other products, particularly those from eBay. Users recommend buying an adapter plate to make the swap easier. Nonetheless, customers suggested the product could benefit from detailed instructions and clarifications on the extra check valve.
Ratings & Reviews
5
8 Reviews
Customers are highly satisfied with the 7" Double Diaphragm Booster for its excellent quality, perfect fit, and noticeable difference it makes. Many acknowledge its universal fit and great finish, making it an ideal replacement for failed or incompatible boosters. It's praised for its superior performance compared to other products, particularly those from eBay. Users recommend buying an adapter plate to make the swap easier. Nonetheless, customers suggested the product could benefit from detailed instructions and clarifications on the extra check valve.
5
8 reviews
5
8
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Filter by Ratings
Fits in tight places
5.0
2 years ago
No ova guy
Tx
Verified
Cleared valve cover with straight brackets
Would Recommend
Excellent 7" Double Diaphragm Booster
5.0
2 years ago
Marv
California
Verified
Replaced a 7" single diaphragm booster with this 7" double diaphragm. The difference is very noticeable.
Would Recommend
It fit perfectly.
5.0
3 years ago
Rusty Nuts
Wheatland Ok
Verified
I call the technical department because I wasn't sure of what I needed. Have to wait talk for a bit he knew exactly the part I needed. And it fit perfect. Thank you guys.
Would Recommend
Yes
5.0
5 years ago
Guido
Florida
Verified
Fits perfect
Would Recommend
7 inch duel diaphragm booster
5.0
5 years ago
Jc
Cincinnati
Verified
I purchased a kit from e bay that included brake pedal booster and master. The booster failed shortly after install pedal would not return all the way. This speedway booster was a direct replacement no drilling and has a great finish
Would Recommend
Boosted my day
5.0
5 years ago
Dave
Alabama
Verified
Universal fit. Try walking into NAPA and ask for booster for 49 Ford with aftermarket mustang II front end
Would Recommend
Nice booster for the $
5.0
5 years ago
J
San Diego
Verified
Nicely made booster and works perfect. My only knock is that it comes with another check valve (tan colored) but nobody knows what it's for. Though straight forward it should come with minor directions/troubleshooting/and an explanation for the extra check valve
Would Recommend
Convert to power brakes
5.0
9 years ago
Garold
Sulpher Oklahoma
Verified
After I received it found I needed to also order an adapter plate th match up to the two bolt master cylinder bracket. If you are making a conversion to pb don't forget the adapter speedway also sells, makes the swap so much easier.
Would Recommend
Showing 8 of 8 reviews