Check the listing for details. 1955 58 Chevy 8" Dual Power Booster + Smooth Master & Brackets Chrome Disc Drum. Condition: New. Listed at 173.68 USD. 1955 58 Chevy 8" Dual Power Booster + Smooth Master & Brackets Chrome Disc Drum Description: Designed for a 1955 1956 1957 1958 Chevy Car.THIS SETUP IS DESIGNED FOR DISC/DRUM APPLICATIONS. Description: Chrome 8" Dual brake boosterChrome Smooth Top Master Cylinder This booster kit 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 square 3 3/8" apart (center to center). The master cylinder a 1" bore and the 4 ports measure 9/16" and 1/2". Zinc plated Mounting Brackets rod and clevis designed for a 1955 1956 1957 1958 chevy CHROME disc/drum proportioning valve kit (self adjusting valve and bracket to mount kit to the side of the master cylinder). Package: As shown in our pictures Professional Installation is Highly Recommended. (No Instruction Included)