GM Chrome 7" Single Diaphragm Power Brake Booster w/ Finned Top Master Cylinder 3/8" Ports Dual

DESCRIPTION 7" Single Diaphragm Power Brake Booster  --This is a brand new 7" Chrome SINGLE brake booster. --This 7" booster is ideal for most small to mid size street rods and customs. --The booster mounts with a 4-bolt pattern. --The 4 bolts are in a perfect square and are 3 3/8" apart (center to center). --The booster requires 18" of vacuum to operate properly. --With this vacuum level the booster will produce a maximum pressure output of 950 psi with a 1" bore master cylinder. --This pressure level works well for four wheel drum systems and disc/drum vehicles which are relatively light. Brake Master Cylinder Finned Top --GM Universal Aluminum Master Cylinder --1" Diameter Shallow Bore --3/8'' Double Sided Ports --Chrome Finish --Finned Top --Includes 2 plugs --Package: Including all items in the picture. Note: Professional Installation is Highly Recommended. (No Instruction Included)