Name is Danny. I'm from upstate SC and my wife and I own a 2010 Flex w/ecoboost and I own a 2009 Shelby GT500. I'm hoping to do a few very minor things to the Flex to increase power and mpgs.
Welcome to the community, glad to have you here! A tune is the simplest route to adding power and possibly mpgs to your Flex. 4DR blazed trails with his 2011 Flex, pretty amazing to watch his build. Here is his summary of findings: