I have an '06 f150 4x4 5.4 bought the evo 3 months ago, and I'm not seeing the impact others have, Bill and I have spoken about this, he's a hell of a nice guy
, I want to upgrade to gryphon and just use their stock tunes because the only upgrades I have are kn drop in and flowmaster muffler only, these stock tunes are better than evo stock, correct?
Or could I go into my evo myself and customize certain things like Std Shift, Timing, Torq, Not knowing really what I'm changing sounds like a mistake though
any thoughts, anyone