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Product Summary

Universal Fit, Vacuum Diaphragm Dual Brake Booster Type

  • Compact for installation under floor or on firewall of almost any vehicle
  • NEW booster measures 7" in diameter
  • Master cylinder has a 1 1/8" bore with 3/8"-24 IFF outlets on both sides of the master cylinder
  • Booster bolt pattern is four bolts on 3 3/8" centers which fits a variety of brackets and pedal assemblies
  • New parts make installation cleaner and easier

Comes as a Kit

Key Specs

MFG. Part #91031412
BrandSpeedway Motors
Brake Booster Diameter7 Inch
Master Cylinder MaterialSteel

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Speedway Motors 91031412 Details

Compact 7" 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

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

Speedway Motors 91031412 Specifications

KEY SPECS
MFG. Part #91031412
BrandSpeedway Motors
Brake Booster Diameter7 Inch
Master Cylinder MaterialSteel
GENERAL
Brake Booster TypeVacuum Diaphragm Dual
Outlet CountTandem/Both Sides
Outlet Fitting3/8"-24
Master Cylinder Bore Size1-1/8 Inch
Brake Booster MaterialSteel
Overall Length13.5"
Master Cylinder Port Sizes3/8"-24 IFF
Bolt Hole Pattern3.38" x 3.38"
Centerline of Holes3.38"
Reservoir IncludedYes
Sold in QuantityKit
Notes9103190 STEEL PORT PLUG KIT.