The 2013 McLaren MP4-12C is an all new model based on the development of the spider model. It has a revised gearbox, retuned "Intake Sound Generator", and does not change the CO2 emissions and fuel economy. As a result, the top speed increased by 2 mph and 0-124 mph and 0-186 mph times decreased. The production of the MP4-12C was discontinued in April 2014 as the company shifted its focus to its successor: the 650S.