This is the McLaren P1 GTR (and yes, it's insane)

When you're cooking up a track-only supercar based on the already bonkers McLaren P1, taking the subtle approach is probably the wrong strategy. Still, there's definitely no way the McLaren P1 GTR could be overlooked among weekend racers, as the British marques first design concept suggests: that vast rear wing alone should have spectators gawping. The picture, prepared by McLaren …