I'm not aggressively modded, just a chip, intake and catback and I think the dod delete is overrated. I'm not sure how beneficial the mpg are, but I know it's something. I also have a corsa, so no drone and I have an 09.5.
If you're going to change cam, sure, but I'm not sure I'm all aboard the "you gotta do it" train. Keeping in mind I have a summer dd and not a track g8.
2009.5 G8GT Premium OnyxRed Interior
corsa catback, vararam intake, cortex tune
custom audio, sharksfin, HIDs, LED Fogs, 20" MRR GT1's