Did some service on my 2011 today including replacing the air filter after around 30k miles. The one that was in there was a Napa Gold 9883 and I installed a Motorcrat FA-1883. The old one was visibly dirty but not completely covered so I doubt flow was significantly impaired. Interestingly, the Motorcraft filter is SIGNFICANTLY thinner than the Napa Gold- I would say that the napa/wix was roughly 1.5x the thickness of the Motorcraft unfortunately I wasn't thinking at the time and didn't take any pics. The Napa/wix pleats are just shy of 2 inches from base to tip and about 5 pleats per inch. I don't much like opening airboxes multiple times so maybe somebody has a FA-1883 to compare otherwise I'll probably cave eventually and get some measurements.