No two RWB cars are alike, because each one is built by hand, one at a time
Akira Nakai established Rauh-Welt Begriff — German for "Rough World Concept" — in 1997, taking its name from a car group he belonged to in the late 1980s and early 1990s. Working exclusively on Porsche 911s across generations from the classic 930 and 964 through later 993, 996, and 997-era cars, Nakai builds each RWB car by hand and in person, traveling to the car rather than shipping kits — meaning every RWB build is a genuine one-off, not a mass-produced kit installed by a third party. The style spread from Japan across the globe through the 2000s and 2010s and remains closely tied to Nakai personally overseeing each build. That combination — genuine rarity, hand fabrication, and Nakai's direct personal involvement in each car — makes an authentic RWB fundamentally different to value and insure than a generic "wide-body Porsche."
RWB, model by model
Every RWB build is a unique, one-off car rather than a standardized model line — tell us about your specific 911 generation and build.
RWB Wide-Body Builds (930/964-era & Beyond)
1997–Present (Each Car a One-Off)
Hand-fabricated wide-body conversions applied individually to classic and modern Porsche 911s, personally overseen by Akira Nakai on each build. No two cars are identical, and each carries its own name and identity within the RWB community rather than a standardized model designation.
Image: Wikimedia Commons
What published insurance data actually shows
The Highway Loss Data Institute (HLDI) — a nonprofit affiliated with the Insurance Institute for Highway Safety — publishes real collision loss statistics by vehicle series, and we cite that data on several of our other marque pages where it exists. It cannot exist for RWB by the nature of the build itself: HLDI tracks losses against standardized manufacturer VIN series, and an RWB isn't a model line at all — it's a series of individually hand-fabricated, one-off conversions with no two cars built exactly alike. We'd rather tell you plainly that the data doesn't exist, and can't meaningfully exist, than cite a number that isn't real. What this means in practice: an RWB has to be underwritten as the unique, individual car it actually is, not against any aggregate data set.
What carriers actually ask before they'll write coverage
Given that every RWB build is a one-off, carriers want documentation specific to that individual car — photos and records of the actual conversion work, confirmation of whether Akira Nakai or a licensed RWB affiliate performed the build, and the underlying Porsche's own documentation — since there's no standardized "RWB model" a carrier can simply look up.
Some RWB owners showcase their car. Others keep it entirely private. Both are covered correctly.
RWB builds are deeply embedded in car culture and are frequently shown at meets and events specifically because each one is unique — but many owners also drive them regularly, since the underlying Porsche 911 platform is built for real use. Coverage should reflect whichever reality actually applies to your car.
An independent brokerage, not a single carrier
We're not captive to one insurance company, and we're not a dealership finance office. That independence is the point: our only job is finding you the right coverage at the right price, then advocating for you if you ever need to use it.
Access to multiple carriers
We shop coverage across a range of specialty and standard carriers instead of pricing everything through one company's rate table, so you see real options instead of a single take-it-or-leave-it quote.
Bundle for a better rate
Combine your RWB with your home, everyday autos, umbrella liability, other collector vehicles, and — where it applies — your business insurance. Carriers price account relationships, and that often means meaningfully better terms across the board.
Four things a standard policy misses
Agreed value for a genuinely one-of-one car
The payout is set based on this specific car's documented build — not a generic "wide-body Porsche" guide that has no way to account for a hand-fabricated, one-off RWB conversion.
Build authentication & provenance
Coverage built around documenting that the conversion is a genuine RWB build, given how much the name's value depends on Nakai's personal involvement or a recognized affiliate.
Underlying Porsche platform documentation
Since RWB builds start from real Porsche 911s spanning multiple generations, the underlying chassis's own documentation and condition history still matters alongside the RWB conversion itself.
Multi-vehicle & collection discounts
Households with more than one collector or modified Porsche are often eligible for meaningfully better account-level pricing.
Get your RWB covered correctly
Tell us about your car — model, build, how you use it, and anything else worth knowing — and we'll put together agreed-value coverage shopped across multiple carriers.