First off i would like to say i have no affiliation with RPI, However i would love to have them send me a set after this free advertisement:haha2:. Well i was a bit skeptical about the scoops and i searched till i couldnt see anymore on this board for the answer i was looking for and couldnt find it. What i wanted to know was how those power gains would translate on the street. Well this past sunday me and 2 other M5board members went for a long fast, and fun ride. We tried all day to get a run in but we always got cut short. BTW this member has the exact same mods as me except he has the RPI scoops and i do not. Long story short we finally got a nice clean stretch of road we could let the beasts run free. We started at about a 10mph roll in first. We were dead even until about mid 3rd gear where he started to pull, it was almost like he just hit the power button and started to pull. It wasnt a crazy walk away but i definetely saw him start to pull away. As we went into 4th his drivers door was about even with my front bumper. unfortunatey we got cut short once again by a car but the answer was clear. We ran it once more after and the and the outcome was identical. My observations were that if we would have ran it to say maybe 6th at the rate he was pulling it would have easily been a 1-1 and a 1/2 car lead. Bottomline they work and are good for at least a car length, for the money it cant be beat!