Recommended with any oil pump re-build. The booster plate kit will provide additional oil pressure throughout the rpm range, especially at idle. Eliminating the tendency of the steel gears to chew into the aluminum cover, this ductile iron plate will make the pump more efficient at low rpm. The steel plate also acts as a girdle reducing the amount that the aluminum timing cover expands when hot, keeping pump clearances tighter thus resulting in additional pressure. Includes booster plate, gaskets, bolts and instructions. Fits 198-215-225-231-252-300-340-350-400-430-455. Also available : TA 1510A, TA prepared Booster Plate. Includes the specially machined plate that is used in our HP oil pump assemblies.