Porsche responded to the reorganization of international GT racing with a series of homologation specials beginning with the naturally aspirated 911 RS and culminating in the GT2 Evo. The lightweight RS set the basic template, using a non-turbo air-cooled flat-6 punched out to 3.8L and rated at 300 bhp, bolt-on Turbo-style wheel-arch flares, larger brake discs clamped by 4-piston calipers and adjustable front and rear anti-roll bars. More obviously equipped for the track, the RSR incorporated a full roll cage, a front strut brace, an adjustable tail spoiler, 6-point harnesses and a fire extinguisher.
Porsche needed something more extreme to race in GT1 events so it developed the 911 GT2 Evo. Designed to compete in FIA GT1, it incorporated a twin turbocharged 3.6L flat-6 engine rated at a full 600 hp and 490 ft lbs of torque. Porsche managed to get 600 horsepower and 491 pound-feet from the engine, making the GT2 EVO the most powerful 911 in history at the time. It was fast too, with sprint from 0 to 60 mph was over in about 3.3 seconds and top speed was rated at 187 mph. The GT2 Evo was short-lived though, with only 11 ever made, as Porsche decided to replace it with the purpose-built 911 GT1 in 1996.