It’s hard to improve on the McLaren 720S, but Miami-based 1016 Industries has found a way. The company has produced a carbon-fiber body kit that shaves 400 lb off the McLaren’s curb weight, and CEO Peter Northrop recently showed it off on Jay Leno’s Garage. This isn’t a bolt-on affair. As Northrop explains in the video, every panel on the 720S was…