I have the same truck and similar mods. The 04-05 pcm runs a little on the lean side, so with your mods, you're going to run a little leaner than stock. PHP can custom tune your pcm so it gives you more fuel, which will give you more power. I don't know if the bully adjusts your a/f mix, if it doesn't, that's probably why you aren't noticing more power. PHP can give you the right a/f mix to take advantage of your mods.
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