The function of the plastic screen (#1) and the metal honeycomb (#2) is to make the airflow more linear before being seen by the MAF sensor and filament. Considering how the stock airbox makes a 90 degree (kinda) right above it, I can see MB's concern, the airflow is very turbulent as it enters the MAF inlet.

That said, these MAF's can be bought on eBay for ~$85, so give it a try. But I would only remove the plastic one!

I await your results!