"C3" is code for the Reid cased TH400 in the 2014. "C2" is the Reid cased PG available in the 5.4 cars. All 2013 were C4, some of the prior year 5.4 cars were too. That fastest ones are sticks, just like in any other form of drag racing.
Those tires look A LOT bigger than what they come with from Ford...