Lexus has turned its already fast IS F over to the go-fast guys at Toyota Racing Development. The finished product is the IS F Circuit Club Sport, and the sport sedan wears a wide range of aero and mechanical improvements. We’ve known this model was coming for some time thanks to a 2010 Tokyo Auto Salon concept and details spouted late this summer, but these photos provide our best look yet at this touring-car-like model. Funk Flex Find Flex On Google+