I got way more than 16, according to the dragstrip dyno. More like 27.
I never dyno'd mine, just going by what Ford Racing said was the gain. Other than the tune and the Borla axle backs, everything else is completely stock on my car.
2013 GT Premium Brembo
MGW, Blow Fish, AM Hood Struts
Tinted, Borla Touring AB, ProCal Tune
Full Shelby/Kicker Audio Upgrade