So, a buddy of mine was telling me last night that I should change out my MAFS to an after market one because the one from the factory barely does the job since I have a CAI,Tb, and plenum. Is that true? Should I upgrade, is it even that much of a difference if I do?
You don't need to worry about maxing out the stock MAF until you either use forced induction, or build the baddest *** N/A engine on the face of the planet!
And aside from your aftermarket plenum, even a CAI and TB won't show any meaningful power gains.