Originally Posted by m_power
I saw at least one US spec intake box for sale under the private sales forum for N/A cars. Pick up one of those, and if you want better air flow and sound do the carbon filter delete. Since you car is a Euro model, reuse your Euro MAF sensor or I believe you'll get an error code. I'd include the link for the air box, but I'm posting from my phone. Good luck!
m_power, that means, don't use the carbon part which says "BMW Performance"?
p.s. btw, Thanks for the link to the sale of US air box