Subtle styling tweaks inside and out differentiate the revised 2008 Porsche Cayenne, which is a substantially upgraded version of the original. Most notable is the new front styling, a handsome if toothsome update that adds a crisp, modern edge to the SUV’s look. Bi-xenon headlights with dynamic bend lighting are standard on the Turbo; optional on Cayenne and S. Rear changes include minor modifications to the fascia and taillights, and new wheels are also part of the deal.