Description
Pontiac Big Block Pulley Kit, V-Belt (350 - 400, 428 & 455).Made in the USA from 6061-T6 Billet Aluminum.Underdrive Ratio Increases Horsepower by 10 - 20 HP.Requires 1968 or newer damper.Requires 1969 or newer water pump (4.5" from flange to engine block)