Awesome stuff Michael! I’m really looking forward to the lower air-intakes in front of the rear wheels, it looks like they’ll have a nicely aggressive angle.
Looking at the sketch phase, I think i personally prefer the front and rear of concept 1 over concept 2. It’s just a little bit more out there. And there is some great stuff/detailing in the untitled2 sketch. As a final note, why did you go with the rounded vents and side cut-out?