Following a move to international motorsports in 1978, Seikel was part of Audi's presence in the European Touring Car Championship.
Seikel would then be hired by Honda to develop the Civic for touring car racing, then running an NSX in the German national GT series.
However, in 1994 Seikel would move to Porsche, and concentrate on the new BPR Global GT Series, as well as running the 24 Hours of Le Mans.
The team ran BPR, as well as its later incarnation the FIA GT Championship until 1998 before concentrating solely on endurances races.
In 2007, Seikel contested their final race, having earned an automatic invitation from the 24 Hours of Le Mans organisers for their result the previous year.