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all depends on what else you've done to it, like the other two said.
If you're totally stock with a few bolt-on mods, then it's not worth changing them. Plus, you're going to have to retune regardless, because your IPW's and IFR's will not be the same.
as far as "too much" a friend of mine is running 60# in his 3400, and it doesn't seem to be too much for his setup (15+psi turbo)
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