bill - great post my .0265478% / Dollar is that when you modify a car, you do it to make the car batter overall. better responce, stability, traction, fuel efficiency etc. NOT FOR MAX HP/kW. Hence why I posted this topic in the first place. to show people what my experiance was from installing the TRD Extractors. by giving them a visual aid in the form of both the dyno and the video they can decide themselves whether or no it is worth their while to do a simialr mod to their car to make an already great driving car even MORE enjoyable to drive.