Porsche 992 GT3 was unveiled on 12 December 2020, the 992 GT3 Cup has a 4.0L naturally-aspirated flat-six boxer engine developing 375 kW (510 PS; 503 bhp) at 8,400 rpm and 470 N⋅m (347 lbf⋅ft) of torque at 6,150 rpm, with a redline of 8,750 rpm. The body is made up of 70% aluminium and 30% steel allowing to keep the weight down to around 1,260 kg. Inside the car, there are new racing seats, a new carbon steering wheel and a new 10.3in screen for data and diagnostics.

Porsche unveiled the facelifted 991.2 GT3 at the 2017 Geneva Motor Show. Extensive changes were made to the engine allowing for a 9,000 rpm redline from the 4.0 litre flat-six engine derived from Porsche 911 GT3 R and Cup racing cars. The engine has a power output of 500 PS (493 hp; 368 kW) and 460 N⋅m (339 lb⋅ft) of torque. Porsche’s focus was on reducing internal friction to improve throttle response. Compared to the 991.1, the rear spoiler is 0.8 inch taller and located farther back to be more effective resulting in a 20% increase in downforce. There is a new front spoiler and changes to the rear suspension along with larger ram air ducts. The car generates 154 kg (340 lb) of downforce at top speed. The 991.2 GT3 brought back the choice between a manual transmission or a PDK dual clutch transmission.

Performance figures include a 0-97 km/h (60 mph) acceleration time of 3.8 seconds (3.2 seconds for the PDK version) and a quarter mile time of 11.6 seconds. The GT3 can attain a top speed of 319 km/h (198 mph).[

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