I'm McLaren 650s GT3 the track-only race-car version of the standard 650S replacing the McLAREN 12C GT3 in 2015. Debuting in the Gulf 12 hours event in 2015 and making a podium finish there, it has since claimed several motorsport victories making it one of the most successful McLAREN racers. The 3.8 L M838T twin-turbo V8 engine has been modified to race specifications and is mated to a 6-speed sequential manual transmission. The engine produces 493 hp (500 PS; 368 kW) under the FIA regulations.