These popular underdrive accessory pulley kit have become one of the most sought after bolt-on's available for today's cars. By reducing the unnecessary speed of the accessories these underdrive pulleys free up an average of 8-15 horsepower on most V8 models while retaining full cooling and charging characteristics. Most pulleys retain the factory serpentine belt. Comes with 3 pulleys (crank, waterpump, and alternator) Picture show aluminum pulleys Midway through the production run for the 2001 model year Ford changed the design of the water pump on the 4.6L engine. The older style pump produced from 1996 to mid 2001 had a longer shaft. In January of 2001 the design of the pump was changed to a shorter shaft. This necessitated a change in the design of the pump pulley. If you have the earlier style production water pump please pick the 96-01 option. For later production choose the 01-04 option. Fits 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 V8 Mustangs |
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