Originally Posted by zip439

Kamilspider, you are thinking along the correct path, but what we do is change both the throttle body and the MAF housing to 74mm AND use the original MAF sensor. The ECU will figure it all out as it is programmed from the factory to work correctly. You will need security torx socket to remove and reinstall the MAF sensor. There has been no reported exhaust temperature problems to the best of my knowledge. As George said we also do the cold air intake along with the 74mm switch to help keep intake air temperature at ambient as the original air filters on top of the engine get too warm from engine heat.