DESCRIPTION Brake Booster --Universal 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 3 3/8" apart (center to center). --The booster requires 18" of vacuum to operate properly. --It also offers approximately 20% (some say up to 27%) more stopping power. --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. Master Cylinder --GM street rod aluminum master cylinder. --High quality, chrome aluminum finish. --1" Bore, 3/8" double-sided ports. --Will work with any drum/.
