I've had fords all my life and just got rid of my 01' lariat 4x4 for an 08' fx4. Already did exhaust and air intake. Thinkin about superchips cortex tuner which has promising results. Only thing, will tuners mess up your engine after time. I mean playing with factory settings on an entire engine seems risky. Last thing I wanna do is f up my new truck. Any advice on tuners would be great.