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Hello i have a 08 with the ford racing cold air and tune i would like to put on a 2.6 pulley do i need to retune if so what do i do ! thanks for your help
 

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Before you change anything return your tune back to stock.
Because if you leave the Ford tune in and change to Evolution or VMP tunes they will download what ever tune you have in there as stock because the tuner assumes that the tune in you're car is stock. If you dont do this you're stock tune will be lost.
Art
 
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