It won't make you any power by itself just as the aftermarket HPFP's won't either. The purpose of all these is to allow a modified tune to take advantage of the additional fueling with the potential to gain more power that way .
You need to keep a margin between the available supply and the engines requirement to keep things nice and stable. The RS4 valve just increases that margin
As Goran has discovered theres some new options worth looking at too
You need to keep a margin between the available supply and the engines requirement to keep things nice and stable. The RS4 valve just increases that margin
As Goran has discovered theres some new options worth looking at too
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