They're not necessary as such, they're just there to channel air in through that pipe that runs inside the nearside wing to the standard airbox. I still use that pipe to provide cold air to the filter inside the heatshield so I keep the headlight cover and the ducting. I'll get round to sorting a cold air feed once I've installed my FMIC and made room for one by removing the SMICs.
Thats the plan I am thinking, my sisters bf works with sheat metal and I making me a heatshield that is more like a box than the one I use to have. With the filter being so big does that pipe fit on? may try and get a headlight cover.