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$209.99
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore

Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore

Universal Fit, Vacuum Diaphragm Dual Brake Booster Type, 8 Inch Brake Booster Diameter, Natural

7 Reviews | 6 Answered Questions
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Lincoln, NE -
Phoenix, AZ -
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Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
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Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
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Part # 91031414
$209.99
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What's In The Kit
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  • Compact for installation under floor or on firewall of almost any vehicle
  • New dual diaphragm booster measures 8" in diameter and provides additional stopping power compared to single diaphragm designs
  • Master cylinder has a 1 1/8" bore with 3/8"-24 IFF outlets on both sides of the M/C
  • Booster has four bolts on 3 3/8" centers which fits a variety of mounting brackets and pedal assemblies
  • Assembled length is 13.5" from booster mount flange to the end of the master cylinder

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Details

Brake Booster Type:
Vacuum Diaphragm Dual
Brake Booster Diameter:
8 Inch
Outlet Fitting:
3/8"-24 (4)
Master Cylinder Material:
Steel
Master Cylinder Finish:
Natural
Master Cylinder Bore Size:
1-1/8 Inch
Brake Booster Material:
Steel
Brake Booster Finish:
Zinc
MFG. Part #:
91031414
Overall Length:
13.50"
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
Notes:
9103190 STEEL PORT PLUG KIT.

Info

Compact 8" 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

Notes

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

Specs

  • Pushrod-to-mounting flange is 5-1/2"
  • Four bolts on 3-3/8" centers
  • 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.
  • Power/Manual Master Cylinder, 1-1/8 Inch Bore
    Qty x 1
  • Speedway Dual Diaphragm Power Brake Booster, 8 Inch, Chromate Finish
    Qty x 1

Reviews

Q & A

Videos & Articles
  • 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!
  • Jeff converts his 1967 Chevelle manual brake system to power by installing a Delco booster kit. Learn how to make the master cylinder more resistant to brake fluid and a few tips for an easy install.

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