Latest Techart works on Porsche 911 GT3 RS feature heavy usage of carbon fiber material on its body panels. Techart is a well-known tuner from German, who has years of expertise on Porsche models. Porsche GTR RS is a high-end model from Porsche. But Techart saw this model has the potential to make it better. Techart has replaced its front fender with a new air extractors, door mirrors, and air intakes.