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$215.99

Dual 7 Inch Brake Booster Master Cylinder Combo, 1 Inch Bore

Universal Fit, Disc/Drum Brake System Type, Vacuum Diaphragm Dual Brake Booster Type

15 Reviews | 20 Answered Questions

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Part # 91031411

$215.99

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You're almost there! This kit has an option or two for you to select. Let us know which options you want for your new kit.

Details

Brake System Type:

Disc/Drum

Brake Booster Type:

Vacuum Diaphragm Dual

Brake Booster Diameter:

7 Inch

Outlet Fitting:

3/8"-24 (4)

Master Cylinder Material:

Steel

Master Cylinder Bore Size:

1 Inch

Brake Booster Material:

Steel

MFG. Part #:

91031411

Overall Length:

13.25"

Master Cylinder Port Sizes:

3/8-24

Bolt Hole Pattern:

3.38" x 3.38"

Centerline of Holes:

3.38"

Reservoir Included:

Yes

Sold in Quantity:

Kit

Info

Compact 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.

Notes

Brake System Builder's Tip (Link)
Booster Tech Tip (GIF)

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

Important Messages

Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.

Some parts are not legal for use in California or other states with similar laws/regulations

What's In The Kit

Each kit from Speedway Motors is carefully packaged and delivered right to your door. Below is a list of all the items you should expect to receive when you order this kit. Some of these items may also be available for sale individually if you're here looking for replacement parts.

Speedway Dual Diaphragm Power Brake Booster, 7 Inch, Chromate Finish

Part # 91031432

Qty x 1
Universal Power/Manual Master Cylinder, 1 Inch Bore

Part # 91031445

Qty x 1

Reviews

Q & A

Videos & Articles

Speedway Tech Talk - Booster Adjustment

Tim talks about brake booster adjustment.
Bel Air Brake Pedal Rebuild

Street Rod Tech Kevin W. talks about the first steps in his plans of a disc brake upgrade on his 1954 Chevy Bel Air, upgrading the pedal to an under-dash setup and adding a booster.
56 F100 Brake Ideas

In this Tech Tip, John responds to a customer request for our recommendations on brake kits for his ’56 F100.

Best Brake Boosters for Better Braking

Power brake boosters offer lower pedal effort and better braking characteristics, but which one is right for your hot rod, muscle car, or truck? We take the guesswork out of that question with our latest buyer's guide.
'55 Chevy Revival

Follow along to see how a 1955 Chevy Bel Air is chosen for a Tri-5 restoration project. From a floral dash to a hole in the floor, there is some work to be done!

Dual 7 Inch Brake Booster Master Cylinder Combo, 1 Inch Bore

Universal Fit, Disc/Drum Brake System Type, Vacuum Diaphragm Dual Brake Booster Type

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What's In The Kit

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