The Dome Zero is a Japanese prototype sports car that is powered by the L28 inline-six cylinder engine. The project was started by Minoru Hayashi in 1975 and the goal was to produce a small volume of the Zero. He would use knoledge gained from his racing career to make the Dome Zero a great performer. The Dome Zero ended up not making it into production but it was a ground breaking design to come out of Japan.
The video below shows some great footage of the Dome Zero. The video is in Japanese.
Sports Cars of the 1970s 