Look at the incredible job they did tucking everything up to the level of the frame rails. You could make a rally-car style skid plate for the WHOLE thing with one flat sheet, it's insane:
However, ONE thing really stood out as APALLINGLY poorly designed. This is just so...LAME...

I'm sure a huge amount of HP could be gained by doing nothing more than replacing that heap of slag with a real exhaust merge. Ah well, one more thing to add to the project list
