Long Style Water Pump for 1999-2001 4.6L Mustangs.Replace your old or broken stock water pump with this quality rebuilt long style water pump. During 2001, the water pump changed from long style to short style. If you have a 100` Mustang you must determine which style you have before purchasing a water pump. You can measure the distance between the pulley mounting flange to the block mounting surface to find out which style you have.
Long Style (1996-2001): 87mm
Short Style (2001-2004): 65mm