Speedway Motors Dual 8-Inch Brake Booster and 1-Inch Bore Master Cylinder Combo, Compact Under-Floor or Firewall Mount with 3/8-24 Ports and 4-Bolt 3-3/8 Inch Pattern

Compact 8" dual diaphragm booster assembly for installation under floor or on firewall of almost any vehicle. Cast iron master cylinder has a 1" 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.

• Compact Mounting Design: Sized for easy installation under the floor or on the firewall of a wide range of vehicles, offering flexible placement options.
• Dual 8-Inch Booster Assembly: Features a new 8-inch dual-diaphragm booster that delivers strong, consistent assist for improved brake pedal feel.
• 1-Inch Bore Master Cylinder: Cast iron master cylinder includes dual 3/8"-24 inverted flare ports on each side, with plugs provided for unused ports.
• Convenient 4-Bolt Pattern: Four mounting bolts on 3-3/8-inch centers and a 5-1/2-inch pushrod-to-flange distance for straightforward fitment.
• Complete Installation-Ready Setup: Includes pushrod stud with 3/8" fine threads, dual outlet ports, and an 8-inch overall depth from mount to outer edge.