Chevy Disc / Drum 7" Dual Power Brake Booster Flat Top Master & Brackets CHROME
$186.34
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). Drum Brakes require residual pressure of 10 lbs. to be held in the line. The disc/disc setup does not require this pressure.