The 993 GT was Porsche's customer race car for the 1995 racing season and thereafter. Pitched against the likes of Chrysler's Viper, the Venturi 400 GTR and Callaway's Corvette, this latest 911 successfully went on to compete internationally for more than half a decade. It won the BPR Championship and its FIA-sanctioned replacement several times, class victories at the Le Mans 24 Hours having come on two seperate occasions. For homologation, 25 road-going examples were required, from which the racing variant had to be very closely derived.

Porsche's experience with the 964 Turbo S LM (raced by the factory between 1993 and '94) served as a useful inauguration for the GT. The new car featured a MacPherson front axle and Porsche multi-link rear axle with LSA system, adjustable Bilstein shock absorbers, an adjustable spring system, front and rear axle control arms fitted with Unibal joints and a front strut brace. Ride-height was dropped and three-piece cross-spoke BBS wheels fitted as standard. There was also a fixed-caliper internally vented ABS disc brake system with electro-hydraulic power assistance. Air-jacks were installed along with a 100-litre FT3 fuel tank and quick re-fuelling system, weight having been cut to the 1150kg class minimum. Porsche's twin turbocharged 3.6-litre flat six was equipped with two KKK 24 turbochargers and a pair of 33.8mm air restrictors, output having been 450bhp at an unchanged 5750rpm. There was a supplementary lubrication system with oil pump and oil cooler, reinforced six-speed manual transmission and single disc racing clutch. Outside, the adjustable rear spoiler had an elevated wing section but the racer was otherwise identical to the road car save for the presence of fastening pins on the front lid. Inside, each car was kitted out with an FIA roll cage, single Recaro racing seat with six-point harness, a fire-extinguishing system and a rudimentary dash. Customers could further enhance their cars by having supplementary nose-mounted light pods installed, essential for racing at night.

A choice of two versions was available, one for the FIA GT Championship and another for the ACO-sanctioned Le Mans 24 Hours. The Evolution differed from its predecessor with modifications to the engine, aerodynamics, chassis, braking system and a reduction in weight. The minimum class weight had by this time been reduced to 1100kg and these latest variants were right on the limit, 50kg lighter than before. Transverse stabilisers were reset on the front and back axles, ABS being eliminated for 1998 as dictated by the regulations (although it was still available by special request). Porsche adapted the brake hydraulics accordingly. The 3.6-litre twin turbocharged flat six engine was equipped with larger KKK 27 turbochargers and a new twin ignition system designed to increase power and reduce fuel consumption. There was also a new pressure-boosting control facility that optimised responsiveness and made it possible to specify the maximum pressure level more precisely. With their 40.4mm air restrictors, FIA GT versions developed 485bhp at 5750rpm. By contrast, anything up to 600bhp was available in unrestricted form, some cars even coming with 3.8-litre engines stroked to 78.1mm. Outside, wider wheels were covered by extended carbon fibre flares, a new lighteight front apron improving air flow to the oil radiators. This facilitated the use of smaller and lighter radiators and there was also a new elevated top section to the rear wing. Top speed rose to 194mph.