Universal 7" Single Diaphragm Power Brake Booster Street Rod for Chevy & Ford Zinc

Description:Universal style 7" zinc single brake booster.Ideal for most small to mid-size street rods and customs.The booster mounts with a 4-bolt pattern. 4 bolts are in a perfect square and are 3 3/8" apart (center to center).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.We highly recommend you purchase the booster and the master cylinder from our store together, which will be perfectly compatible. If you already have a deep pushrod master cylinder and you purchase our short push rod booster alone, you might need a pushrod spacer for installation.Package: Including all items in the pictures.Note: Professional Installation Is Highly Recommended (No Instruction Included).