In 1978, Porsche came out with a modified racing version of the 911 called the 935 or 'Moby Dick' which ditched the classic round head lights and stunted a slanted front end. Shortly after in 1981, the hype over the 935 led Porsche to offer a slant nose conversion for the 930 Turbo Carrera in Europe, exclusively through the customer service department in Werks 1 Porsche factory. They started a program that they call the "Sonderwunsche-Programm" (Special Wishes Program) where they offered their customers a catalog of conversions, modifications and customizing work, starting with the slant nose or 'Flachbau'. By 1987 the conversion would become so popular that Porsche would make it an official listed option throughout '89 which would eventually make it to the U.S through the "Porsche Exclusive Program". Back in '87 a 930 Turbo would set you back about $85 Gs and the Slant nose option was over $29,000 which made the Flachbau an extremly exclusive and expensive car back in the 80's. Werks 1 only converted a total of 262 to slant nose up to '86 and Porsche built 609 from '87 up to '89 making the Flachbau 930 an extremely illusive and desirable ride.(MuayFLY)
