Lexus did one heck of a job turning the IS sedan into the IS F performance machine. But the four-door isn't the only version of the IS. There's also a two-door hard-top convertible, and as these spy shots reveal, the premium brand from Toyota is planning to F it all up, too. Spied undergoing testing at the Nurburgring
, this IS F cabrio is identifiable by its new front bumper, wider wheel arches packing larger stock and a massive rear wing (possibly used for testing purposes only). Also, by the very fact that it's at the Nurburgring altogether.