Rauh-Welt Begriff. Akira Nakai's iconic Japanese Porsche tuning house, famous for hand-built widebody 911s with riveted fender flares.
RWB stands for Rauh-Welt Begriff (German for "rough world concept"), the Japanese Porsche tuning house founded by Akira Nakai in the late 1990s. RWB is famous for hand-building widebody Porsche 911s with riveted fender flares, deep-dish wheels, and individualized livery. Each build is done by Nakai personally, who travels globally to build cars on-site for clients.
The aesthetic is unmistakable: massively flared fenders that Nakai cuts and rivets to the original 911 bodywork, often paired with bright color schemes, a low ride height, and oversized wheels (typically 17 or 18 inch with deep dish). The interior is usually retained close to stock. Most RWB builds are based on the 930 or 964 chassis, though more recent builds have used 993, 996, and 997 chassis.
Each RWB has a name (chosen by Nakai or the owner). Famous RWB cars include Stella Artois, Pandora One, Royal Maddness, and Big Daddy. The total number of RWB builds globally is now over 500 cars. Prices for an RWB conversion typically start around $25,000 to $50,000 (before donor car cost), with bespoke builds reaching higher.