It's funny because their (EVO) website specifically states that they do not recommend alteration of the crank pulley, due to potential damage to the engine. Their pulleys are only for the peripheral equipment eg. alternator, water pump and PS pump. Their claim of up to 12 hp gain from their pulleys makes me very suspicious, especially after reading that article I posted.

I think I'll spend my money elsewhere... Oddly enough I'm finding alot of these claims from various companies to be over inflated at best. Short of forced air induction, cams, porting & polishing and headers I would save my time and money... Not even the PowerChip I had done has provided a noticeable difference that justifies the cost.