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Speedway Dual Diaphragm Power Brake Booster, 8 Inch, Chromate Finish
Speedway Dual Diaphragm Power Brake Booster, 8 Inch, Chromate Finish

Speedway Dual Diaphragm Power Brake Booster, 8 Inch, Chromate Finish

Universal Fit, 5.25" Overall Thickness, 8" Outside Diameter, 3.38" x 3.38" Bolt Hole Pattern

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Speedway Dual Diaphragm Power Brake Booster, 8 Inch, Chromate Finish
Speedway Dual Diaphragm Power Brake Booster, 8 Inch, Chromate Finish
Speedway Dual Diaphragm Power Brake Booster, 8 Inch, Chromate Finish
Speedway Dual Diaphragm Power Brake Booster, 8 Inch, Chromate Finish
Speedway Dual Diaphragm Power Brake Booster, 8 Inch, Chromate Finish
Speedway Dual Diaphragm Power Brake Booster, 8 Inch, Chromate Finish
Speedway Dual Diaphragm Power Brake Booster, 8 Inch, Chromate Finish
Speedway Dual Diaphragm Power Brake Booster, 8 Inch, Chromate Finish
Speedway Dual Diaphragm Power Brake Booster, 8 Inch, Chromate Finish
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Speedway Dual Diaphragm Power Brake Booster, 8 Inch, Chromate Finish
Speedway Dual Diaphragm Power Brake Booster, 8 Inch, Chromate Finish
Speedway Dual Diaphragm Power Brake Booster, 8 Inch, Chromate Finish
Speedway Dual Diaphragm Power Brake Booster, 8 Inch, Chromate Finish
Speedway Dual Diaphragm Power Brake Booster, 8 Inch, Chromate Finish
Speedway Dual Diaphragm Power Brake Booster, 8 Inch, Chromate Finish
Speedway Dual Diaphragm Power Brake Booster, 8 Inch, Chromate Finish
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Part # 91031435
$109.99
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  • Compact for installation under floor or on firewall of almost any vehicle
  • NEW dual diaphragm booster measures 8" in diameter
  • Booster mounts with four bolts on 3-3/8" centers
  • Master cylinder studs measure 3-3/8" on center
  • Booster measures 5-1/4" thick from mount surface to mount surface

Details

MFG. Part #:
91031435
Overall Thickness:
5.25"
Outside Diameter:
8"
Bolt Hole Pattern:
3.38" x 3.38"
Centerline of Holes:
3.38"
Rod Length:
4"
Material Type:
Steel
Finish:
Zinc
Sold in Quantity:
Each
Notes:
Dual diaphragm booster.
Brake Booster Type:
Vacuum Diaphragm Dual

Info

Compact, 8" diameter for installation under floor or on firewall of almost any vehicle. Zinc chromate finish.

  • 3-3/8" Bolt Pattern (Firewall Side)
  • 3-3/8 Center to Center Bolt Hole (Master cylinder Side)
  • Uses adjustable pin
  • Great for installs on GM A, F, X, Body Cars with Big Blocks or Engines with tall headers

Booster Tech Tip (GIF) 

Brake System Builder's Tip (Link)

Learn more about the proper uses of residual valves by reading our tech article. Brake System Selection

Notes

Length from mount face to M.C. mount face is 5-1/4". Pushrod extends 4" from mount face and has 3/8"-24 threads. Mount bolts are 5/16"-20 x 7/8".  

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

  • 8" O.D.
  • 5-1/8" main body length
  • 10-1/2" overall length
  • Back of the booster to the end of the threaded plunger rod is 4-1/8"
  • Firewall mounting studs are ¾" long at 3-3/8" center-to-center
  • Front master cylinder studs are 1-1/8" long at 3-3/8" center to center

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

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