Nico Rosberg will run Mercedes' old-specification exhaust in practice for the United States Grand Prix as the team seeks to better understand its recent aerodynamic developments.
Source: http://www.iracing.com/inracingnews/formula-one-news/f1-formula-one-news/rosberg-to-practice-with-old-exhaust
Billy Garrett Jo Gartner Tony Gaze Geki
