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#91031411
$213.99
/kit
In Stock
Quantity
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Universal Fit, Disc/Drum Brake System Type
Comes as a Kit
View Kit Components
| MFG. Part # | 91031411 |
| Brand | Speedway Motors |
| Brake System Type | Disc/Drum |
| Brake Booster Diameter | 7 Inch |
| Master Cylinder Material | Steel |
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Return PolicyCompact 7" 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
| KEY SPECS | |
|---|---|
| MFG. Part # | 91031411 |
| Brand | Speedway Motors |
| Brake System Type | Disc/Drum |
| 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 Inch |
| Brake Booster Material | Steel |
| 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 |
4.7
31 Reviews
Customers have expressed satisfaction with the product's confirmed qualities and features. Many acknowledged its usability in a variety of applications, adapting well to different vehicle models and custom setups. Its compact size and fitting ability were frequently mentioned, proving its practicality. Users reported that it worked well under limited installation space. Many praised the product's dependability, indicating high material quality. Furthermore, the booster and master cylinder combo is confirmed to enhance power brakes to various vehicles optimally. Customers repeatedly stated they would buy the product again, underscoring its quality and consistent performance. Several pitted the product as superior to competitors, primarily due to its versatility, excellent fit, and straightforward installation.
4.7
31 reviews
5
25
4
5
3
0
2
0
1
1
Most Liked Positive Review
5.0
Just like the picture
I put it on my Chevy II with four wheel disc brakes. Fit great.
Most Liked Negative Review
1.0
No
While talking to the representatives on the phone they should have told me there was a mounting bracket that I would need in order to make the booster work
Filter by Ratings
No
1.0
3 months ago
Bart
New york
Verified
While talking to the representatives on the phone they should have told me there was a mounting bracket that I would need in order to make the booster work
Would Not Recommend
It's good brake system, works nice!
5.0
11 months ago
JMack
Dallas Tx
Verified
Power brakes are so nice! We needed to fabricate a mounting bracket for the firewall, but nothing difficult.
Would Recommend
Just What I Needed
5.0
a year ago
E.J.
Eau Claire WI
Verified
7" booster fit nicely under the floor. Came with the "spud" needed to connect the master cylinder to the booster.
Would Recommend
Yes
4.0
a year ago
Duane
St Paul
Verified
3/16th lines fit right in yes
Would Recommend
great unit and easy install
5.0
2 years ago
fry
Windsor ontario
Verified
changed out a single to a duel and it was plug and play
Would Recommend
Great quality
5.0
2 years ago
Babaloos pinstriping
San Bernardino ca
Great quality. Easy to install. Works great on my 54 Chevy.
Would Recommend
Yes I would buy again.
5.0
2 years ago
Jeepster
Cabot, Ar
Verified
Excellent value.
Would Recommend
i hope i don't need another
5.0
2 years ago
Steve
summerville,sc
Verified
have not used it yet
Would Recommend
Worked great
5.0
2 years ago
Bill
NC
Verified
Front disc brakes were dragging on a classic Chevrolet truck. Replaced with this power brake booster/master cylinder combo. Worked like it should! Problem solved.
Would Recommend
Yes
5.0
3 years ago
Flummoxed
Jackson Michigan
Verified
I don't know about other applications, but this was exactly what I needed.
Would Recommend
Showing 10 of 31 reviews
20 Questions • 10 Answers
is it possible to get this Dual 7 Inch Brake Booster with a remote reservoir 1 inch bore Master Cylinder?
by Reinout
• 6 years ago
1 answer
View Answer
I have a 1956 f100 with 4 wheel disc. Will this work?
by Joey
• 7 years ago
1 answer
View Answer
I got the booster and master kit #91031411, I just got my pickup drivable today, when I step on the brakes, it's like there is no power assist, really have to step on pedal hard to stop, re bleed the brakes, checked my vacuum , engine is stock 350 chev, vacuum feels good, don't have a gauge, what would you suggest? I have a lot of mechanical experience, want to see what you think before I start taking things apart. thanks
by Rick
• 7 years ago
1 answer
View Answer
What port is for the rear? And for the front
by Ruddog
• 7 years ago
1 answer
View Answer
I have a 1948 1 1/2 ton dually and I would like to update the brakes. It currently uses an 11" single diaphragm booster. The axles/brakes are large (think Rockwell axles), but it came from the factory like this. Would a 7" dual diaphragm be sufficient, or would you suggest larger? I have plenty of room for mounting.
by Lipton
• 8 years ago
1 answer
View Answer
What size clevis is needed to connect to the pedal assembly
by Keith
• 8 years ago
1 answer
View Answer
Will this fit if installed in stock location on a 57 f-100 with hydrolic clutch?
by Flaco loco
• 9 years ago
1 answer
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Does this Master Cylinder use a Double Flare or Bubble Type Brake Lines ?
by Sam Stone
• 9 years ago
1 answer
View Answer
Where would I find the little pin that sits inside the master cylinder? The one that in the master cylinder between the brake booster and master cylinder. About 1.5" long and 0.5" diameter if I had to guess. I lost mine during unboxing.
by 29EssexRat
• 9 years ago
1 answer
View Answer
I ordered this for my 63 F100. The mounting bracket and rod end are not included. How do I get this mounted to my firewall?
by Joshua
• 9 years ago
1 answer
View Answer
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