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#91031430
Single Diaphragm Power Brake Booster, 7 Inch, Chromate Finish
- Compact for installation under floor or on firewall of almost any vehicle
- Single diaphragm booster measures 7" in diameter and fits in the tightest spaces possible
- Booster has four bolts on 3 3/8" centers which fits a variety of mounting brackets and pedal assemblies
$156.99
/each
In Stock
Garage Sale alternatives: from $121.99
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Product Summary
Universal Fit, 3.70" Overall Thickness, Steel
- Compact for installation under floor or on firewall of almost any vehicle
- Single diaphragm booster measures 7" in diameter and fits in the tightest spaces possible
- Booster has four bolts on 3 3/8" centers which fits a variety of mounting brackets and pedal assemblies
- The length 4 bolt mounting face to master cylinder mount face is 3-5/8"
- Zinc plated for corrosion resistance
Key Specs
| MFG. Part # | 91031430 |
| Brand | Speedway Motors |
| Outside Diameter | 7" |
| Material Type | Steel |
| Finish | Zinc Plated |
Need To Know
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Speedway Motors 91031430 Details
Single diaphragm boosters are compact for installation under floor or on firewall of almost any vehicle. Booster measures only 7" in diameter. Zinc chromate finish. The single diaphragm is usually used on lighter vehicles. In the heavier applications of 3000-3500 pounds or more we normally use the dual diaphragm boosters.
You will need full manifold vacuum available to the booster. Manufacturer requirements vary between 18 and 20 inches of vacuum. With radical cams there are many cases where there is a loss of the necessary vacuum and the only option is a 12 volt vacuum pump available from Speedway under part number 91028146.
- O.D. is 7" Length from mount surface to master cylinder mount surface is 3-5/8" (this does not include the shoulder that extends into the master cylinder)
- 3/8 x 24 thread pushrod that is 4" long from mount surface to end of the threads (pushrod nut included)
- 4 bolt mount pattern on 3-3/8" centers
- Mount bolts are 5/16 x 20 and 7/8" long and nuts are included
- Master cylinder mount studs are 3/8 x 18 and 1-1/16" long and 3-3/8" on center
Learn more about selecting the proper brake booster for your vehicle by reading our tech article.Brake System Selection.
Charts
Booster Tech Tip (GIF)
Guides & Documents
Speedway Motors 91031430 Specifications
Speedway Motors 91031430 Specifications
| KEY SPECS | |
|---|---|
| MFG. Part # | 91031430 |
| Brand | Speedway Motors |
| Outside Diameter | 7" |
| Material Type | Steel |
| Finish | Zinc Plated |
| GENERAL | |
| Overall Thickness | 3.70" |
| Bolt Hole Pattern | 3.38" x 3.38" |
| Centerline of Holes | 3.38" |
| Brake Booster Type | Vacuum Diaphragm Single |
| Sold in Quantity | Each |
| Notes | Length from mount face to M.C. mount face is 3-5/8". Pushrod extends 4" from mount face and has 3/8"-24 threads. Mount bolts are 5/16"-20 x 7/8". M.C. mount studs are 3/8"-18 x 1-1/16". |
Ratings & Reviews
5
15 Reviews
Reviewers praise the product for its excellent quality, practical use and high performance in various vehicles ranging from a '63 Nova SS to a '30 Model A Pickup. Its compact design enables fitment even in minimal space without compromising functionality. The product is appreciated for working perfectly right upon installation, indicating ease of use and reliability. Its compatibility with different vehicles exemplifies its versatility. The product appears to be recommended for its perfect fit, easy adjustment and operational success, with many customers inclined to repurchase for future needs, signifying high customer satisfaction.
Ratings & Reviews
5
15 Reviews
Reviewers praise the product for its excellent quality, practical use and high performance in various vehicles ranging from a '63 Nova SS to a '30 Model A Pickup. Its compact design enables fitment even in minimal space without compromising functionality. The product is appreciated for working perfectly right upon installation, indicating ease of use and reliability. Its compatibility with different vehicles exemplifies its versatility. The product appears to be recommended for its perfect fit, easy adjustment and operational success, with many customers inclined to repurchase for future needs, signifying high customer satisfaction.
5
15 reviews
5
15
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5.0
a year ago
Pres
Gainesville, Ga
Verified
Replacement Booster 1934 Ford Streetrod
Would Recommend
Great fit.
5.0
a year ago
J
MT
Verified
Love the size it's going in a very tight area again. Going to work out great.
Would Recommend
I would definitely buy this booster again
5.0
2 years ago
Bill
Miami, Fl.
Verified
Everything on this booster was correct. No installation problems.
Would Recommend
.Great product at a decent price.
5.0
2 years ago
JAKE
western Iowa
Verified
I installed this on a 1963 Nova SS. It now has a V8 and auto trans.
Would Recommend
I would buy again
5.0
2 years ago
Hot Rod Lane
Sheridan Mi
Verified
it worked when installed, doesn,t get any better than that
Would Recommend
I would definitely buy this booster again
5.0
4 years ago
Rooster
Panama City, Fl
Verified
It fit perfect and works great.
Would Recommend
If I needed another I would buy this again
5.0
4 years ago
Glwhite
Shellsburg iowa
Verified
Bolted right up on my 42 ford business coupe and worked great
Would Recommend
I would buy this product for future projects
5.0
5 years ago
racerdave
Lake Havasu city az.
Verified
I was worried about the small space I had to work with but it clears all other components just fine
Good quality in a compact size ! Worked perfect !
5.0
5 years ago
Eduardo
Elephant Butte, New Mexico
Verified
The booster worked perfect to operate the rear brakes on my V8 trike project.
Would Recommend
Great quality parts!!
5.0
5 years ago
DrC10
Tucson az
Verified
Worked great in a 68 Jeep with only minor modification. Priced well and shipped rapidly... another win for Speedway!
Would Recommend
Showing 10 of 15 reviews