Dual 8 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Universal Fit, Vacuum Diaphragm Dual Brake Booster Type, 1.13" Bore Size, Natural, Zinc, Steel
- Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
Build Your KitYou're almost there! This kit has an option or two for you to select. Let us know which options you want for your new kit.
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.
- 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
What's In The Kit
Power/Manual Master Cylinder, 1-1/8 Inch BorePart # 91031440Qty x 1
Speedway Dual Diaphragm Power Brake Booster, 8 Inch, Chromate FinishPart # 91031435Qty x 1
More Like This
Dual 7 Inch Brake Booster Master Cylinder Combo, 1 Inch Bore
Dual 8 Inch Brake Booster Master Cylinder Combo, 1 Inch Bore
Single Diaphragm Chrome Booster Master Cylinder Combo
Single 7 Inch Brake Booster Master Cylinder Combo, 1 Inch Bore
Dual 7 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Single 7 Inch Brake Booster Master Cylinder Combo, 1-1/8 Inch Bore
Dual Diaphragm Stainless Booster Master Cylinder Combo
Tuff Stuff 2129NA Brake Booster w/Master Cylinder, 9 Inch
Classic Performance UNIHBK-SB Hydroboost Brake Assit System
1964-1974 GM Disc Brake Booster Conversion Kit Combo
Q & A
After getting the control arms and drop spindles installed last time, we are dying to see what it looks like on the ground. Today we are working with the Speedway Deluxe Disc Brake Kit. Josh and Joe are on a roll!
Tim demonstrates the brake assembly with a Wide 5 drum brake and Speedway's new self-energizing backing plate.
Tim explains the process of adjusting Buick Finned Drums to fit Speedway's self-energizing backing plate assembly.