RWB stands for Rauh-Welt Begriff, described as German for Rough World Concept. The workshop was founded in Chiba, Japan, by Akira Nakai, who came out of the country's street and racing scene. An RWB conversion adds riveted widebody fender arches, a front lip, side skirts and usually a large rear wing, along with wide deep-dish wheels and coilover suspension. The changes are to bodywork and suspension rather than the engine. At the 2015 SEMA Show, iForged Wheels and RWB brought five modified cars.
