I read a few threads on a different forum about that same mod and those folks didn't see any significant performance gains. In fact, the 6.1L intake is aluminum whereas ours are plastic, so the 6.1L intake will most likely retain more heat. I'm guessing that's why on the 6.4L they switched to a plastic intake vs metal.
Yeah you're better off getting a tuner if you haven't done so already. Get an Intune or Trinity, get a custom email tune for it, and go light the tires up and have some fun.
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