The performance package says that the spoiler improves theaerodynamics. So clearly tesla didn't make it the best they could for the molded-in factory spoiler. Makes me wonder how much longer it can be to be maximally efficient. The aero covers could be replaced with smooth covers to improve things there too. Or is there some vortex benefit thing that I am on aware of to make that not true? I'm actually planning on getting a license for wind tunnel modeling software for a couple months once I get my car (AWD on order).