Complex sentence: Joe took an interest in motorsport and wanted to campaing a car in the Grand Prix that would be held in Nassau, Bahamas, which included a special Volkswagen class to promote his EMPI products at the race.
Split into simpler sentences: Joe took an interest in motorsport and wanted to compete in the Grand Prix that would be held in Nassau, Bahamas, which included a special Volkswagen class. He wanted to promote his EMPI products at the race.