For its latest interior renovation, Polish leather specialist Carlex Design used a Subaru Impreza WRX STI that Cosworth will soon be putting under the knife. So while the premium AWD model awaits a significant boost in power, its cabin was treated to a serious overhaul. Ferrari Red leather with a range of stitching and rivets adorns the driving space; the Rosso leather complementing the Optic Carbon leather superbly for an interior that's both sporty and aggressive - the perfect foil to the soon-to-be Cosworth-tuned WRX STI.