Steinmetz Opel-Tuning is an automobile tuning company specialising in Opel cars, based in Aachen, Germany. They develop higher performance engines, sports suspension, special exhausts and complete aerodynamic bodystyling kits. Their engineers believe that the proving ground for all products is still in motorsport. See also Irmscher OPC Bibliography Klaus Steinmetz - Ein Leben für den Motorsport, Klaus Steinmetz, Oliver Steinmetz, Heel Verlag (2007), (German) Opel GT Motorsport 1968-1975, Stefan Müller, Detlef Kurzrock, Maurice Van Sevecotte, Petrolpics Verlag (2008), (German) References External links Steinmetz German website Steinmetz English website Video clips Opel Auto parts suppliers of Germany Vehicle manufacturing companies established in 1993 Automotive motorsports and performance companies Auto tuning companies Companies based in Aachen