The factory offered the GT option, which was distinguishable by its box-like steel fender flares.

In 1970, a 914/6 with the factory's GT option was entered in the grueling 1970 24 Hours of Le Mans race.

914/6s also competed in some of the most important race competitions of its era, e.g. Targa Florio with Brian Redman, Monte Carlo Rally and Daytona International Speedway.

Walt Maas successfully campaigned a 914/6 "GT" in the IMSA race series.

The 914/6 received the ram-tuned Weber carbureted 2.0-litre flat six 110 hp Porsche engine that had been previously used with the basic 1969 911T.