Why is my 2017 430i engine making excessive noise/rumbling?

What is your question?

I'd really appreciate any help with this. I just installed a MAD BMW cold air intake on my 2017 430i, and am now experiencing problems. Just after installing the intake, the engine was fine (with idling/small revs), but after starting it up again after a few hours of not driving, the engine is making a lot more noise, and rumbling very loudly. The engine bay noise (standing outside the car) is noticeably louder, and inside the cabin, there's a very loud rumbling/shaking noise. I checked all of the clamps and everything seems to be sealed correctly. Would it possibly be a MAF sensor error? Not sure if this would relate, but I did accidentally drop a wrench into the engine bay, that I haven't been able to get out. First time modding my car, and hope this isn't a major issue. Thanks for any advice. The audio is linked to soundcloud, and is the car starting -> idling.