The 993 GT2 was initially built to meet homologation requirements for GT2 class racing. These regulations governed the construction of cars for the GT2 class, impacting features like engine size and weight [https://en.wikipedia.org/wiki/Chrysler_Viper_GTS-R].
In 1999, the 993 was replaced with the 996 model. Porsche decided to concentrate on competing in Le Mans GT class racing with the naturally aspirated 911 GT3, abandoning the GT2 for motorsports use. Developed primarily as a road car, the 996 GT2 featured a twin-turbocharged version of the GT3's 3.6 L (220 cu in) flat-six engine, generating a maximum output of 340 kW (462 PS; 456 hp), later increased to 355 kW (483 PS; 476 hp).
The 996 GT2 was superseded by the 997 GT2 in 2007, launched in November after an official presentation at the 62nd Frankfurt Motor Show. The GT2’s engine featured two variable geometry turbochargers, generating a maximum power output of 390 kW (530 PS; 523 hp) at 6,500 rpm and 680 N⋅m (502 lb⋅ft) of torque at 2,200 rpm. It accelerated from 0 to 100 km/h (62 mph) in 3.6 seconds and on to 200 km/h (124 mph) in 10.6 seconds, with a maximum top speed of 328 km/h (204 mph). Motor Trend tested a 2008 Porsche 911 GT2, achieving a 0–60 mph (0–97 km/h) acceleration time of 3.4 seconds, and a quarter mile time of 11.4 seconds at 127.9 mph (205.8 km/h).
In May 2010, an RS variant of the 997 GT2 was announced to German dealers. The engine in the GT2 RS generated a maximum power output of 456 kW (620 PS; 612 hp) and 700 N⋅m (516 lb⋅ft) of torque. The GT2 RS weighed 70 kg (154 lb) less than the GT2, allowing for a top speed of 330 km/h (205 mph) and a 0–97 km/h (0–60 mph) acceleration time of 3.3 seconds. Porsche produced only 500 units of the 997 GT2 RS globally.
The 991 GT2 RS was unveiled at the Xbox 2017 E3 briefing and officially launched at the 2017 Goodwood Festival of Speed. Powered by a 3.8 L twin-turbocharged flat-6 engine, it generated a maximum power output of 515 kW (700 PS; 691 hp) at 7,000 rpm and 750 N⋅m (553 lb⋅ft) of torque. Porsche claims a 0–97 km/h (0–60 mph) acceleration time of 2.7 seconds and a top speed of 340 km/h (211 mph). The car features a magnesium roof, carbon-fibre front lid, wings, and boot lid, and a titanium exhaust system, with a wet weight of 1,470 kg (3,241 lb). A Weissach package further reduces weight by 30 kg (66 lb) through additional use of carbon-fibre and titanium. A production run of 1,000 units was planned, though four units were lost at sea in 2019, prompting Porsche to restart production. In 2017, the 911 GT2 RS driven by Porsche test driver Lars Kern set a 6:47.3 minute lap time around the Nürburgring Nordschleife, averaging a speed of 184.11 km/h (114.40 mph) [https://en.wikipedia.org/wiki/List_of_N%C3%BCrburgring_Nordschleife_lap_times].
The GT2 RS Clubsport, a track-only variant of the GT2 RS, was introduced at the 2018 LA Auto Show. It features new aerodynamic elements and removal of non-essential components to decrease weight. The car weighs 1,390 kg (3,064 lb) and is limited to 200 units. The SRO Motorsports Group launched a one-make series featuring the GT2 RS Clubsport in July 2019.
The Porsche GT2 has a long history in international motorsports, beginning with the 1974 911 Carrera turbo for Group 5 racing. The 993 GT2 race car featured a stripped interior, integrated rollcage, and modified suspension, with twin KKK turbochargers allowing for 335.7 kW (450 hp). The GT2 and GT2 Evo earned seven wins in their class out of eleven rounds during their first full BPR season in 1996, as well as class victories in the 1996 and 1997 24 Hours of Le Mans. Porsche became the first manufacturer to commit to the new SRO GT2 category in 2018, with the Porsche 911 GT2 RS Clubsport, which has since competed in GT Sports Club America and the GT2 European Series. An Evo kit for the car was introduced in 2023.