1999-2000 Ford Mustang GT 4.6L (Early Design)
You should visually identify which pulley/pump you have before ordering regardless of model year! Mid-way through the production run for the 2000 model year Ford changed the design of the water pump on the 4.6L engine however the change is apparently based on the origin of the engine and is not specific the model year. The early style pump had a longer shaft. The later design of the pump was changed to a shorter shaft. This necessitated a change in the design of the pump pulley. Read on. The early water pump pulley had a convex or ''bowed-out'' face and the later design has a concave or ''pressed-in face''. There is no exact changeover date for the pump and pulley. It is important to visually inspect your car to see which design you have. Supposedly the changeover occurred in January of 2000, but we have seen cars with identical January build dates and different water pumps and pulleys. We have also seen the early design pulleys used on a few 2002 models, so be sure to check your vehicle before ordering.
Refer to the pictures below to determine which pulley design you have. Since there is no definitive answer as to the time line or model years, we will refer to the pulleys from each manufacturer as early and late design.
|Early Design |
Note: The face is (convex) bowed outward.
Note: The face is (concave) despressed inward.
Performance Series Ford Pulleys
Increases horsepower by reducing accessory drag and eliminates belt throwing. 12.5 HP at rear wheels. These pulleys have been designed for normal street driving.
Power & Amp Series
March Ford Pulleys increase horsepower by reducing accessory drag. 11 HP at rear wheels. Perfect for vehicles with automatic transmission or high-amperage need. Designed to give superb performance while maintaining perfect electrical charging, even at idle. They are excellent for harsh stop-and-go driving.
High Water Flow Series
March Ford Pulleys increase cooling by speeding up water flow and fan speed. This is crucial during critical low-speed driving when most overheating occurs. High Water Flow Ratios pulleys are just what you need to prevent overheating.
Steel Sets are precision machined to run perfectly true. High-carbon billet steel covered with iron phosphate and then powdercoated high-gloss black polyester for maximum rust prevention.
Aluminum Sets are machined from 6061-T6 billet aluminum for extra strength and wear. Pulleys are also hard coated on all high wear surfaces to increase pulley life. Finished with a "No Polishing" clear powdercoat.
WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.