I read that as well, Don't know if it's fake or real. I wonder what would time the spark and fire it in relation to the correct cylinder. Also looking at the picture... Those would be plug wires with an 8" deep boot as from the top of the cover down to where a plug would be. . I think it's nonsense, Don't you think we'd have heard about this mod if it really adds 21 to 23mpg.