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$179.99
Speedway Single Diaphragm Power Brake Booster, 7 Inch, Chrome Finish
Speedway Single Diaphragm Power Brake Booster, 7 Inch, Chrome Finish

Speedway Single Diaphragm Power Brake Booster, 7 Inch, Chrome Finish

Universal Fit, 3.75" Overall Thickness, 7" Outside Diameter, 3.38" x 3.38" Bolt Hole Pattern

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Speedway Single Diaphragm Power Brake Booster, 7 Inch, Chrome Finish
Speedway Single Diaphragm Power Brake Booster, 7 Inch, Chrome Finish
Speedway Single Diaphragm Power Brake Booster, 7 Inch, Chrome Finish
Speedway Single Diaphragm Power Brake Booster, 7 Inch, Chrome Finish
Speedway Single Diaphragm Power Brake Booster, 7 Inch, Chrome Finish
Speedway Single Diaphragm Power Brake Booster, 7 Inch, Chrome Finish
Speedway Single Diaphragm Power Brake Booster, 7 Inch, Chrome Finish
Speedway Single Diaphragm Power Brake Booster, 7 Inch, Chrome Finish
Speedway Single Diaphragm Power Brake Booster, 7 Inch, Chrome Finish
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Speedway Single Diaphragm Power Brake Booster, 7 Inch, Chrome Finish
Speedway Single Diaphragm Power Brake Booster, 7 Inch, Chrome Finish
Speedway Single Diaphragm Power Brake Booster, 7 Inch, Chrome Finish
Speedway Single Diaphragm Power Brake Booster, 7 Inch, Chrome Finish
Speedway Single Diaphragm Power Brake Booster, 7 Inch, Chrome Finish
Speedway Single Diaphragm Power Brake Booster, 7 Inch, Chrome Finish
Speedway Single Diaphragm Power Brake Booster, 7 Inch, Chrome Finish
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Part # 91031450
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  • 3-3/4" thick from master cylinder mount face to firewall mount face
  • 4" long firewall mount face to end of pushrod
  • Booster mounts to bracket or body with four bolt square pattern on 3-3/8" centers
  • Master cylinder studs are two 3/8" coarse studs across from each other on 3-3/8" centers
  • Booster on master cylinder side for master cylinder snout or flange to fit into is 1.620"

Details

MFG. Part #:
91031450
Overall Thickness:
3.75"
Outside Diameter:
7"
Bolt Hole Pattern:
3.38" x 3.38"
Centerline of Holes:
3.38"
Material Type:
Steel
Finish:
Chrome
Sold in Quantity:
Each
Brake Booster Type:
Vacuum Diaphragm Single

Info

These show-quality chrome 7" diameter boosters have a single diaphragm for use with lightweight cars. Accepts most power brake master cylinders.

  • Pushrod stud is 3/8" fine thread
  • Master cylinder studs are two 3/8" coarse studs across from each other on 3-3/8" centers
  • Booster is 3-3/4" thick

Booster Tech Tip (GIF)

Learn more about selecting the proper brake booster for your vehicle by reading our tech article. Brake System Selection.  

Notes

Installation Note: Before installing the master cylinder onto the booster, you may need to make an adjustment.  The pushrod on the brake booster should protrude 1/16" from the face of the booster to insure proper engagement with the master cylinder.

Specs

  • 3-3/4" thick from master cylinder mount face to firewall mount face
  • 4" long firewall mount face to end of pushrod
  • Booster mounts to bracket or body with four bolt square pattern on 3-3/8" centers
  • Master cylinder studs are two 3/8" coarse studs across from each other on 3-3/8" centers
  • Opening of booster on master cylinder side for master cylinder snout or flange to fit into is 1.620"
  • Booster is 3-3/4" thick from mounting surface to mounting surface for master cylinder
  • Shaft coming out of booster for attachment to pedal arm is 3/8" fine thread
  • Outside diameter is 7"

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

Reviews

Q & A

Videos & Articles
  • When it comes to a traditional style build on an early hot rod it just has to be rolling on a solid front axle of some sort. In this buyer's guide we take you through I-beam and round tube solid axles, spindle choices, radius rod needs, and more.
  • 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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