DTM

At first Formula 3, then STW, now DTM - for Opel, relying again on the good cooperation of Rüsselsheim and Ditzingen went without saying, when it came to entering DTM (German Touring Car Masters). Since the move to the new facilities located at the Dieselstraße, Spiess had got what it takes to build nearly the complete engine in house. 80 percent of all the components are built by Spiess. The V8-engine curtailed by two air restrictors represented a new task, for the Spiess engineers. Still, they quickly found out that the position of the air restrictors was vital. The V8 delivers a mighty 470bhp, thus being the most powerful engine designed by Siegfried Spiess Motorenbau GmbH to date.