I think that the R2Cs did produce gains but never tested how much. I think that it is important to get as much cool air to the filter as possible and highly recommend the Modshack vent mod for any intake you are using. When I stop for a red light, the intake temp rises pretty quick but as soon as I accelerate it is back to normal within a few seconds. By the way, the filters themselves have a great reputation and obviously are very easy to clean and no need for oil. I just read the dyno report on the G37 and he seemed to gain significant power
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