Water pump impeller for the Ford Zetec black top 1.8 2.0 and ST170 engines to allow the water pump to be driven in the direction of engine rotation. This gets round the problem of having idler pulleys and long belt run. Allows direct drive from crankshaft. Billet aluminium CNC machined and hard anodised. Replaces std plastic impeller. Do not confuse these with other cheap plastic copies, our billet item is over 22% more efficient due to proper testing and correct design and makes ideal for high output Turbo and N/A race applications as well as road use.