So far, it's definitely better than stock air boxes, which I've had in a little over a week now. No argument there. Butt dyno says the missing power is back.
That said, the Injen long tubes definitely moved more air. No doubt about it. The Stillen moves it at WOT whereas the Injen seemed to pump it in even at idle. This is perhaps what gave the I Jen setup a deeper, lower growl.
I'll give it the weekend to see how it goes and let the mass airflow sensors fully recalibrate. With the tune I don't think the ECU will make any adjustments, but could be wrong on that.
Have some plans that fully center around the G3 setup and had been prepared to plunge forward with it but now I think I need to give it a couple days and see how this shakes out.
Stillen vs Injen part II coming up!
Edit: oh and there's a slight drone now that wasn't there before. Pretty much has to be the combination of G3 with the ART + e370 Motordyne setup.
Installed pic:
