Complex sentence: In 2004 they built the engine commissioned by Toine Hezemans for the Pagani Zonda GT1-car and in the winter of 2005 APP Racing Engines started the Corvette GT3 race car project also commissioned by Toine Hezemans.
Split into simpler sentences: In 2004 they built the engine commissioned by Toine Hezemans for the Pagani Zonda GT1-car. And in the winter of 2005 APP Racing Engines started the Corvette GT3 race car project also commissioned by Toine Hezemans.