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Dont be discouraged, its the delta that matters...dyno to dyno youll get vastly different results, ive seen dyno logs of stock n55s making as low as 230whp depending on the conditions. Depending on how many pulls you did id imagine the OE intercooler got totally heatsoaked as well.
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E88 N54 Alpinweiss/Coral Red/Motiv HTA 3586r Tial .82AR/Other stuff...652WHP
F30 N55 XDrive EBII
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