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Click on the link, it's a real world review by turbo magazine on a Nissan Altima of all cars. Thats about as econo box as you can get (the year they tested) It showed significant gains but read the whole article and it goes into detail. Hope that helps
Thanks for posting the link. It has alot of good info but I still want to know more about this. I'm gona do some more research and if you find any more info please let me know.
