Air Intake Mod

Looking for help and knowledge: I'm interested in increasing air flow through the stock air filtration system, but I want to keep the factory filter in place. I've read a few posts regarding opening up the front air passage area behind the Grille and cutting some of the air duct out up front. Also, I'm wanting to add some Grille protection too, in order to keep bugs, birds and other debris out. Anyone having some knowledge or input about this mod, i would appreciate hearing from you.

Thanks in advance,
deucer