no they don't. well not off the factory floor they don't. All of those engines make less HP on E85 than they do on regular gas. Now tuned out for E85 with bigger injectors to drink down the fuel yes they can produce more power. but off the factory floor - no they do not. as far as more power on more octane - that's generally true to a point and one of the bigger factors is Intake Air temp. But I'm probably beating a dead horse here. As far as the intake question - for the N/A engines they can provide benefit but ford did a good job of making the current kit pull colder air. so the biggest benefit is the better filter media and lack of restriction though the filter. A drop in will probably do just as good. Why is this the case because the same box and tube is similar or mostly the same as the box and tube used on the ecoboost turbo mill - and that pulls even harder. The restriction on the ecoboost mill is not the filter but the piping internal to the stock intercooler. Which is part of why you see the gains on aftermarket intercoolers on other vehicles. The biggest flow restriction is the intake valves.