An RWB Porsche isn't just a modified sports car. It's an analog sculpture built by one man. Akira Nakai travels across the globe with a suitcase of hand tools, an angle grinder, and masking tape. He doesn't rely on digital renderings or factory templates. Instead, he transforms classic air-cooled and modern water-cooled 911s into aggressive widebody machines by eye. Every finished chassis receives a proper name before he packs up his gear. This hands-on process created a global subculture that bridges underground Japanese street racing with high-end automotive art.
Purists often clash with customizers over cutting the original steel fenders of a vintage Porsche. Yet these builds command immense respect because of the sheer human dedication behind them. Understanding an RWB car requires looking past the oversized aero kits and examining the roots of Rauh-Welt Begriff, the build methodology, and the realities of owning a hand-crafted machine.
The Origins of Rauh-Welt Begriff
The story starts in Chiba, Japan, long before any 911 wore a wide fender. In the late 1980s and early 1990s, Akira Nakai ran with the Mid Night Club, an infamous underground highway racing group on Tokyo's expressways, and a loose collective known as Rough World. They drove low-slung, aggressively tuned Toyota AE86s with matte paint and serious attitudes.
When Nakai translated "Rough World Concept" into German, he coined Rauh-Welt Begriff, which shortened naturally to RWB. In the late 1990s, a damaged 1985 Porsche 930 landed at a specialty body shop where he worked. He bought it, stripped the interior, fitted a flat-six engine with carburettors, and built his own widebody interpretation. He named that foundational car Stella Artois after his preferred beer. That single machine set the visual language for every build that followed.
The Anatomy of an RWB Build Process
What separates RWB from major tuning houses is the absence of a production line. When a client commissions a build, Nakai boards a flight to the car's home country. He works directly on the donor car over several intense days.
- Permanent Modifications: Nakai takes an angle grinder to factory steel fenders. This is an irreversible step that makes purists wince, but it's essential for clearance.
- Hand-Fitted Fiberglass: The massive overfenders, deep front splitters, and side skirts are riveted on by eye. There are no CAD measurements or laser guides.
- Stance and Suspension: Each car receives custom suspension tuning and deep-dish wheels—often SSR or Work wheels—pushed out to fill the newly widened arches.
- The Signature Wing: Most builds feature a towering double-decker rear wing bolted directly to the chassis to provide high-speed stability.
- Personalized Naming: Before he leaves, Nakai hand-paints or applies a name inside the door jamb or engine bay, cementing the car's identity.
For deeper technical context on Porsche's factory engineering history, you can read more via Porsche AG.
Donor Cars: Air-Cooled Legends vs. Modern Chassis
While the spiritual home of RWB remains air-cooled icons like the 964 and 993 generations, Nakai has expanded his scope.
The Porsche 930 represents the vintage core, offering classic widowmaker lines enhanced by massive hips. The Porsche 964 and 993 are the most popular choices, balancing classic round headlights with modernized suspension pickup points. Occasionally, water-cooled models like the 997 receive the treatment, though traditionalists debate whether liquid-cooled engines fit the raw aesthetic of a rough-world build.
Driving Dynamics: Are They Track Weapons or Show Queens?
A common misconception paints RWB cars as fragile trailer queens built strictly for Instagram. History tells a different story. Early RWB development cars routinely set time attack records at circuits across Japan and competed successfully in endurance events like the Idlers 12-hour race at Twin Ring Motegi.
Because the modifications focus primarily on bodywork, aerodynamics, and track width rather than radical engine overhauls, the underlying mechanical reliability depends on the donor car. A well-maintained air-cooled flat-six handles spirited canyon driving or track days with ease. However, the ultra-low ride height and aggressive negative camber mean speed bumps and steep driveways require extreme caution.
The True Cost of Owning an RWB Porsche
Building an RWB car requires a significant financial investment broken into distinct phases:
- The Donor Car: Securing a clean, healthy classic Porsche 911 (such as a 964 or 993) often costs anywhere from $60,000 to well over $150,000 depending on market conditions and mileage.
- The RWB Package: The authentic kit, specialized wheels, suspension components, and Nakai's personal travel and labor fees generally range from $25,000 to $50,000-plus.
- Paint and Assembly: Professional body preparation, custom paint work, interior restoration, and final mechanical tuning add substantial workshop expenses.
Track values and collector trends for classic 911s can be monitored via Hagerty.
Frequently Asked Questions
Can anyone buy an RWB kit and install it themselves?
No. Akira Nakai insists on installing every single signature kit personally. You cannot simply order parts from a catalog and bolt them on in your garage. His travel and hands-on installation are fundamental parts of the brand's philosophy.
Are RWB Porsches street legal?
In most jurisdictions, yes. Because the modifications alter exterior body panels, aerodynamics, and suspension geometry rather than core emissions or engine blocks, most completed cars pass local inspection requirements and retain road registration.
Why do RWB cars feature Japanese and German text?
The name Rauh-Welt Begriff is a deliberate German translation reflecting Nakai's fascination with European engineering, paired with his Japanese street-racing background. Many early cars featured German phrases like Zweite Entwicklung (second development) on their rear quarters as a nod to Porsche's motorsport heritage.
How long does an actual build take?
When Nakai arrives at a workshop to build a car, he typically works continuously for two to four days, cutting, fitting, and fine-tuning every component by hand until the silhouette matches his vision.
