Check the listing for details. Impala Power Booster + Bail Top Master Cylinder & Straight Bracket Kit Chrome. Condition: New. Listed at 122.25 USD. Impala Power Booster + Bail Top Master Cylinder & Straight Bracket Kit Chrome Description:7" single CHROME brake booster with CHROME Ball Milled Master Cylinder, 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 master cylinder in this kit is the Bail Top style, and features a 1" bore and the ports measure 9/16" and 1/2". This master cylinder will work with any drum/drum, disc/drum, or disc/disc setup.the Straight Mounting Brackets/Rod/Clevis Package:Chrome Aluminum Brake Master Cylinder Bail Top 1" Bore Screw Down StyleChrome 7" Single Boosterthe Straight Mounting Brackets/Rod/Clevis As shown in our pictures Professional Installation is Highly Recommended (No Instruction Included)