Its not exactly what you are looking for but I installed the Dinan CAI closed box and the supplies cone filter and it made my 4.4 sound like a BEAST. I absolutely LOVED the sound
I have since upgraded my filter to a Donaldson filter and it reduced the mean growl a bit but not too much.

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I swear, my cars are like a girlfriend.
Sometimes its a rough ride, sometimes its smooth motorin'.
Sometimes she doesnt like how i treat her and sometimes i dont like how she behaves.
BUT at the end of the day, she loves it when I am inside her.

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'91 850i
'05 X5 4.4i
'09 Clubman S