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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 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

Comes as a Kit

Key Specs

MFG. Part #91031414
BrandSpeedway Motors
Brake Booster Diameter8 Inch
Master Cylinder MaterialSteel
Master Cylinder FinishNatural

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Details

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

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

Specifications

KEY SPECS
MFG. Part #91031414
BrandSpeedway Motors
Brake Booster Diameter8 Inch
Master Cylinder MaterialSteel
Master Cylinder FinishNatural
GENERAL
Brake Booster TypeVacuum Diaphragm Dual
Outlet CountTandem/Both Sides
Outlet Fitting3/8"-24 (4)
Master Cylinder Bore Size1-1/8 Inch
Brake Booster MaterialSteel
Brake Booster FinishZinc
Overall Length13.50"
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.