In June 2018, McLaren unveiled the top-of-the-line Sports Series variant online. The car, called the 600LT is based on the 570S and is the third McLaren production car to receive the longtail treatment. Inspired by the 675LT and the F1 GTR Longtail, the body of the car has been extended by 73.7 mm (2.9 in). The 3.8-litre twin-turbocharged V8 engine utilised in the 600LT is tuned to produce a maximum power output of 600 PS (441 kW; 592 hp) (hence the 600 in the name) and 620 N⋅m (457 lb⋅ft) of torque.