It's not any one thing, exactly, but rather the confluence of it all. The stately, elegant, and somewhat under-the-radar look of the LS is gone, replaced with finny, fishy, flappy, fiddly bits in the form of a diffuser, front splitter, side skirts, forged aluminum wheels, and sport mufflers. It's a step above and beyond the LS F Sport.
This is, for now, listed on TRD's Japanese page (as F Sport upgrade parts), and not yet officially released for the U.S. so it's possible we may get a different version of the kit if we get one at all--but for now, this is the high-performance take on the new LS.
Do you get it? If so, please explain in the comments below.
2013 Lexus LS Body Kit by TRD