In the early 1980s, Zakspeed also prepared a Mustang for Ford USA's Special Vehicle Operations to race in the domestic IMSA Camel GT series.

The Zakspeed-prepared machine was run by the works Ford Germany team with Klaus Ludwig, Manfred Winkelhock and Marc Surer at the wheel.

Ford Germany retracted their support and one car was sold to privateers, while the other chassis was evolved by Zakspeed into the C1/4 and the C1/8, making few appearances in international racing, but becoming a front-runner in the German Interserie, where it won the championship in 1984 with Klaus Niedzwiedz.

After a maiden season with Jonathan Palmer, the team hired the first Formula 3000 champion Christian Danner and ex-Tyrrell driver Martin Brundle.

The Japanese engine was unreliable and drivers Bernd Schneider (former German Formula 3 champion), Piercarlo Ghinzani and the rookie Aguri Suzuki struggled to pre-qualify the car.

In 1998, Zakspeed entered two Porsche 911 GT1 in the FIA GT Championship, where French Team Oreca dominated the GT2-class with their heavily modified Chrysler Viper GTS-Rs.

One of these Vipers was purchased by Zakspeed to be entered on the Nürburgring VLN series to take advantage of the new, less restrictive rules for the 1999 season.

In 2008, Zakspeed managed the Superleague Formula cars of Borussia Dortmund and Beijing Guoan, with the latter taking the overall title from such clubs as PSV Eindhoven, Liverpool F.C.