Well so many people aay that the gt40x heads dont have air injection provisions. But every picture i look at shows different.. If the gt40x turbo swirls dont have air injection then why do u need thermactor plugs ??? Also what are the holes on the heads that are in the same spots as the trickflow heads and even e7s?? Lmr says they dont have the holes for the air injection. But every picture ive seens shows different. Im far from blind and to me they look like the thermactor ports for air injection... Can anyone who owns a pair of these heads tell me if those holes are infact the injection holes? And if they arnt then why do u need thermactor screws for them???