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Message: <blockquote data-quote="Marky Dissod" data-source="post: 27050" data-attributes="member: 13218">Yes the pair of electric fans takes the place of the mechanical clutch fan. They are powered by an electrical fan harness.Hopefully you're not thinking 'this is some krabpy aftermarket horseschidt' - think of it as updating your radiator cooling package to 2005 / 2006 GM OE.It's worth 5-10 horsepower (depending on RpM) and a 2-3MpG depending on how you drive, so it will eventually pay for itself.</blockquote>