Not sure about the Banks but I picked up a used AFE Stage 2 and gained 2 MPG in the city. Very pleased with the quality and performance of that intake.
You have to keep in mind that a turbocharged engine functions a lot differently than a naturally aspirated motor, and the turbochargers only have so much air demand at any given time to generate the boost pressure that the ECU is calling for. With a big enough sensor housing or inlet tube, you'd eventually trip a CEL, but that's another issue entirely.First off, Tons of info in this thread! Thanks!
But I do have one unanswered question - from what I could see.
New Eco boost owner.
Is there such a thing as too much air intake for a stock 2013 Eco boost? I'm interested in the gains on the AFE intake but just curious if it's too much air or if that's a thing, "too much air".