The SHS C6 marked Sauber’s return to top-level sportscar racing following their earlier Group 5 BMW M1s. Among the more notable features of the SHS C6 was the large "whaletail" rear wing, centrally mounted on the chassis. For subsequent WSC and DRM races, neither SHS C6 was able to finish, including at the 24 Hours of Le Mans. However, Brun and Sauber would later finish 7th at Norisring, 4th at Hockenheimring, and 8th at Hockenheimring again in DRM, then followed by a 9th at the 1000km Spa and 5th at 1000 km Mugello in WEC. With these results, Sauber managed to finish tied for 5th in the World Endurance Championship for Manufacturers.
Following the 1982 season, Sauber decided the SHS C6 needed improvement and began development of a replacement, the Sauber C7, with a BMW motor. As they were no longer needed for 1983, the two SHS C6 chassis were retired, but were soon revived by Walter Brun. Brun took over the assets of GS-Sport, renaming it Brun Motorsport, and modified one of the SHS C6s into the Sehcar C6.
The Sehcar C6 debuted at Silverstone in 1983 with Hans-Joachim Stuck as co-driver, but retired after 32 laps with a gearbox failure. The car was fitted with a BMW engine for the race at the Nürburgring, where Brun had an accident, destroying the car and resulting in a broken arm. A second Sehcar, fitted with a Porsche engine, was entered for the 24 Hours of Le Mans but did not start due to preparation issues. The Sehcar Porsche returned at the 1984 1000 km of Monza, but did not start due to an engine failure. At Silverstone, the Sehcar finished 15th, marking the first finish for the car in a World Sportscar Championship race.
In 1985, Roland Bassaler purchased an SHS C6 and installed a BMW M88 3.5L I6 engine to compete in Group C Junior. The car finished 23rd at the 24 Hours of Le Mans and 17th at the 1000km Spa, failing to score any championship points. Bassaler continued in 1986, finishing 17th at Brands Hatch and scoring the team’s only points with a 12th-place finish at the Nürburgring, an event won by a Sauber C8. Bassaler continued to race at Le Mans until 1988, without achieving any further finishes.
The SHS C6 returned to competition again in 1993, entered by Roland Bassaler in the C2 class at the 24 Hours of Le Mans, fitted with a 3.5L BMW I6. The car did not finish due to an accident. In 1994, the car participated in the top LMP1/C90 class, rebadged as the Alpa LM and fitted with a 3.5L Ford Cosworth engine, before retiring after a suspension accident on the 64th lap. The car was the oldest car to ever participate at the 24 Hours of Le Mans.
This article is based solely on the provided corpus from www.racingsportscars.com. No external sources, primary archives, autobiographies, period programmes, or specialist publications were consulted.