BB-Auto built customers the cars they couldn’t get from the manufacturer. Its first big coup was a Porsche. In the 1970s, the Stuttgart-based company announced that the body of their 911 Targa was too soft for a Turbo Targa. For Buchmann, this was less a rejection than a challenge. After all, even back then, he always wanted to have the fastest car. And it had to be a convertible. Engine, chassis, and aerodynamics were always Porsche’s priority. Bb-Auto focused on equipment, interior design, and quality. With various stiffening measures, Buchmann and his team created a Targa body with a wider rear-end. Through an advertising cooperation with Polaroid, the car was given a legendary paint job with accents in rainbow colors. The Porsche 930 Turbo Targa, also known as the rainbow Porsche, was born and instantly famous.