2004 - 2008 F150 2004, 2005, 2006, 2007 and 2008 Ford F150's with 5.4 V8, 4.6 V8 engine

Those with Underdrive pulleys

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02-22-2005, 06:12 AM

mlawdawg

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Those with Underdrive pulleys

FOr those who have them, can you tell me what kind of difference it makes in accelleration, and what effect it has on normal operation of teh vehicle (heating and cooling fan speed and efficiency, etc.)? Thanks

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