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      03-18-2012, 07:18 PM   #2
ndog14
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Drives: E90 328xi 6MT
Join Date: Aug 2011
Location: Pittsburgh, PA

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You won't get 15HP out of that. What that ECU does is make the minimum octane rating for the N52 as 91. Also, that 15HP it promises is with the air intake it comes with. And that air intake isn't a cold air intake. I have not seen a reasonably priced cold air intake for the N52. What those air intakes do is pull in hot air from the engine bay. You're better off with a DAS scoops, K&N filter, and a charcoal filter.