The 2012 Wrangler has brought a few changes due the new engine and to add another to the list is the front driveshaft hitting the exhaust on a Jeep with 2.5″ or more lift. See the 2012 Wrangler Model Changes and Compatibility Guide for all the stuff we have found so far.
Above pictures were taken while the Jeep was on a lift with the factory suspension fully extended. The shocks are the limiting factor.
Teraflex has announced an exhaust spacer to help with this problem. The spacer will allow exhaust clearance on the front drive shaft on Jeeps with lifts up to 5 inches.