Mercedes has run a 'megaphone' exhaust during testing in Barcelona in a trial to improve the sound of the 2014 engines. The new power units are noticeably quieter than their V8 predecessors, leading to complaints from race promoters who told Bernie Ecclestone during a meeting on Saturday that they want the noise issue addressed. In response to the concerns, the teams agreed to trial a way of increasing the noise, with Mercedes running a 'megaphone' exhaust on the rear of the W05 on the second day of testing at the Circuit de Catalunya. Nico Rosberg carried out a number of aero tests at the start of the day but later ran at full throttle with the exhaust, which didn't result in much audible...
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