I have a 4.6 and have most of the Dinan mods available. My butt dyno says there is more power and its just overall more responsive. In sport mode it seems I am always in the power band when driving through canyon roads.
I think most of the results are coming from the software for the engine and trans. The Air intake is nothing fancy, just a cone filter with a heat shield. I would go with the AFE stage 2 if I was to do it again. The Throttle body looks no different than the stock to me. I want to get the Dinan mufflers, but I am having a hard time swallowing the $1,600 price tag for 2 mufflers.
So I would get the AFE intake and Dinan software if I were you. X-pipe if you haven't done already.
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