I got this intake and installed a few days ago. Initial impression is that I don't hear anything. Really disappointing. I had BMS on my f30 n55 and it sounds really good.
I think the additional intake silencer needs to be removed for it to sound any better.
I can't speak to power gains but I can say that the OEM intake filter seemed very restrictive. It has an extra layer of foam , again, to keep things quiet.
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