Saw this today on one of the Mustang forums. Says you can improve gas mileage by 2-4 mpg on a Mustang. Don't know how it would apply to the 4.6L F150 engines, especially since there is a tremendous weight difference....

Anyway, I emailed them today to see if it can apply to our trucks. If it does, it might be worth a look.


http://www.steeda.com/products/fuel_economy_paks.php

Also, see this:

http://forums.bradbarnett.net/showthread.php?t=473215

 

Got an email back from Gus at Steeda. They do in fact have a pulley kit for the F150. Trying now to see if they have any hard data as to the types of MPG gains with the truck.