You can take them off no problem. Make sure you have the right socket or you will strip it. If you do end up stripping it you can break the plastic and you will find a metal post inside with a 10mm to remove. It is a heatshield though, so id only remove if replacing with an aftermarket one
Echo that.. .not like it's a performance upgrade. I would leave it in place. YOu'll just have the turbo heat now trapped under the hood instead of behind that shield and who know's how it'll impact the CAI you just installed.