Since 2014, F1 cars have a turbo charger and a single exhaust pipe in a very clever hybrid drive system with two electric motor-generator units. In case you did

Since 2014, F1 cars have a turbo charger and a single exhaust pipe in a very clever hybrid drive system with two electric motor-generator units. In case you didn't follow F1 last year, there was a lot of complaints about the lack of noise. The noise coming out of the exhaust pipe is wasted energy. In previous years, this wasted energy was utilized by putting the exhaust pipes to blow the diffuser, creating more aerodynamic downforce. The 2014 F1 cars consume a lot less fuel (fuel tank is 100 liters vs. 190 liters in 2013), with very little loss in actual performance.