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Product Summary

Universal Fit, 7 Inch Brake Booster Diameter, Chrome

  • These show-quality brake combos come with a 7" single diaphragm chrome plated steel booster and a chrome master cylinder
  • Master Cylinder has a 1" bore and dual 3/8"-24 IFF outlets (on both sides)
  • New single diaphragm booster measures 7" in diameter and is the smallest size offered which fits well in tight spaces
  • Booster has four bolts on 3 3/8" centers which fits a variety of mounting brackets and pedal assemblies
  • Assembled length is 12" from booster mount flange to the end of the master cylinder

Comes as a Kit

Key Specs

MFG. Part #91031451
BrandSpeedway Motors
Brake Booster Diameter7 Inch
Master Cylinder MaterialSteel
Master Cylinder FinishChrome

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Details

These show-quality brake combos come with a 7" single diaphragm chrome plated steel booster and a chrome master cylinder with a 1" bore and dual 3/8"-24 IFF outlets (on both sides). Includes plugs for unused ports.

Suitable for use with front disc/rear drum brake systems.

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

Charts

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
  • 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
  • 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"

Specifications

KEY SPECS
MFG. Part #91031451
BrandSpeedway Motors
Brake Booster Diameter7 Inch
Master Cylinder MaterialSteel
Master Cylinder FinishChrome
GENERAL
Brake Booster TypeVacuum Diaphragm Single
Outlet CountTandem/Both Sides
Outlet Fitting3/8"-24 (4)
Master Cylinder Bore Size1 Inch
Brake Booster MaterialSteel
Brake Booster FinishChrome
Overall Length12.00"
Master Cylinder Port Sizes3/8"-24 IFF
Bolt Hole Pattern3.38" x 3.38"
Centerline of Holes3.38"
Reservoir IncludedYes
Sold in QuantityKit
NotesChrome finish on both master cylinder and booster.