Porsche enthusiasts around the world have likely come across the name RWB. Known for its dramatic wide-body conversions, handcrafted fender flares, and unmistakable stance, RWB has become one of the most respected names in the world of Porsche customization.

But what exactly is RWB, who is the man behind it, and how much does an RWB build cost?

Let’s take a closer look.

1. What is Porsche RWB?

RWB stands for Rauh-Welt Begriff, a German phrase that roughly translates to “Rough World Concept.”

Founded in Japan, RWB has become famous for transforming classic Porsche 911s into aggressive, wide-bodied machines that combine motorsport styling with street presence.

Unlike many aftermarket body kits, every RWB Porsche is individually built and fitted by hand. The process involves permanently modifying the original bodywork by cutting the factory fenders before installing the signature overfenders.

Each car receives its own unique personality, making no two RWB Porsches exactly alike.

Some of the most popular Porsche models used for RWB conversions include:

• Porsche 964
• Porsche 930
• Porsche 993
• Porsche 997 (less common)

The wide stance, deep-dish wheels, lowered suspension, and race-inspired aerodynamics have made RWB one of the most recognizable Porsche tuning styles in the world.

2. Who is Akira Nakai?

At the heart of RWB is Akira Nakai, the founder of Rauh-Welt Begriff.

Before creating RWB, Nakai-san was deeply involved in Japanese drifting culture through his AE86 crew known as Rough World. His passion later shifted toward Porsche, where he developed his now-famous wide-body philosophy.

One of the most remarkable aspects of RWB is that Akira Nakai personally installs almost every official RWB kit around the world.

Instead of sending installers or licensing workshops, Nakai travels internationally to complete each build himself. During the installation, he hand-cuts the factory fenders without using templates, relying entirely on his years of experience.

Watching Nakai-san transform a Porsche has become an event in itself, attracting enthusiasts from around the globe.

This hands-on approach is one of the reasons why RWB cars are considered more than just modified vehicles—they are often viewed as rolling pieces of automotive art.

3. How Much Does an RWB Porsche Cost?

The total cost of an RWB build varies depending on the Porsche model, the body kit selected, and any additional modifications requested.

A complete RWB project can easily exceed USD $50,000 to $100,000, not including the price of the donor Porsche.

How long does it take?

The actual installation by Nakai-san is surprisingly fast.

Once all parts are prepared and the car is ready, the hands-on installation is often completed within one to three days.

However, the overall project usually takes much longer because of:

• Ordering the RWB kit
• International shipping
• Paint preparation
• Wheel fitment
• Suspension setup
• Scheduling Nakai-san’s international travel

For many customers, the complete process can take several months, depending on availability and logistics.

4. Final Thoughts

An RWB Porsche is far more than a wide-body conversion.

Every build reflects Akira Nakai’s unique craftsmanship, combining Japanese tuning culture with one of Germany’s most iconic sports cars. Because each car is hand-built and individually installed, every RWB Porsche tells its own story.

Whether you’re a collector, Porsche enthusiast, or simply appreciate automotive craftsmanship, an RWB build represents one of the most distinctive expressions of Porsche customization in the world.