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In 2002, all of the standard models received a minor makeover in 2002 which included Turbo-style headlights, a freshly designed front clip and an increase in engine capacity to 3.6L along with a subsequent 20HP boost. The bodies were more rigid which further improved handling and safety and the lower, stiffer X74 suspension became available as a factory modification. From the outside, it was hard to notice the difference between the 1998 version and the facelifted model. The main difference was on the headlights. Including the Mk 1 cars, the 996 Carrera Coupe sold 46,317 units.
The 996 GT3 Cup served as the basis for the 996 GT3 road car, featuring a 3.6 litre engine with 355 hp. For the 1999 season the engine output was increased to 365 hp. For the 2001 season the GT3 Cup received modified aerodynamics including an enlarged rear wing and improved cooling. For 2002, the GT3 Cup received several changes, adopting facelift 996.2 features such as Turbo-style headlights. The new body significantly improves aerodynamics and cooling. Engine output was increased to 380 hp. For 20003 onward, the power was hiked once again, with the engine now pumping out 385 bhp @ 7250 rpm and of torque 288 ft lbs @ 6500 rpm.
The second generation GT3 takes all that was good about it's predecessor and then improves it! Power from the GT1 derived flat-6 is up by 21 bhp to 381 bhp (with an 8200 rpm redline), ride height is lowered for increased stability and also has an upgraded braking setup, as it features a 6-piston calipers on the front. Two versions are offered, the more extreme 'Clubsport' showing it's track day colors with a full roll cage, racing seat and a 6-point harness. The 996.2 GT3 was the first GT3 marketed in the North America. The new Porsche 911 GT3 comes with all the features of half a century Porsche motorsport. It is a sports car for the purist through and through.
The GT3 was based on the standard 996 Carrera, but was stripped of a great deal of equipment for weight savings, featuring stiffer, adjustable suspension and upgraded brakes. The GT3 used the bodyshell of the four-wheel-drive Carrera 4, which incorporated additional front-end stiffening. It featured a naturally aspirated 3.6-litre flat-six engine generating a maximum power output of 360 bhp @ 7200 rpm and torque of 273 ft lbs @ 5000 rpm. This engine was shared with the 996 Turbo and was a derivative of the engine developed for the 911 GT1 race car.
The 996 GT3 R was a one-year-only (2000 model year) special of which only 63 were produced. The car took the basic GT3 bones and amplified it for motorsport. The Mezger engine produced over 400 horsepower, while factory-fitted adjustable shock absorbers gave better handling. Most notably, the GT3 R wore carbon-fiber bodywork meant for ultimate light weight in motorsport. The 996 GT3 R was introduced in 1999 as a replacement for the 993 RSR. Before its introduction, it was extensively tested at Weissach and Paul Ricard. In the 2000 FIA GT Championship, the 996 GT3 R was in the N-GT class and won every run. Won the 24-hour race at the Nürburgring. 
In 1999, Porsche celebrated the turn of the century with a special edition – the 996 "Millennium Edition". The 911 Millennium edition was based on the Carrera 4 coupé and was pretty rare, with only 911 cars made. Based on the Carrera 4, the "Millennium Edition" was limited to 911 examples and was based exclusively on the wide bodied Carrera 4. This special edition was finished in Violet Chromaflair paint, which, depending on the light changes from dark violet to light green and is quite spectacular to look at. It also got a caramel-colored leather interior and polished "turbo-twist" wheels.
Since 1989, the rear-wheel-drive Carrera has always been accompanied by an all-wheel-drive Carrera 4, and the 996 was no different. Overlapping with the last year Carrera 993'S, the 996 Carrera 4 represented two major changes for the venerable 911 lineage: a water-cooled flat-6 engine replaced the air-cooled engine used in the previous 911 model, and the body shell received its first major re-design. Engine was 3.4 L and power was 296 hp featuring a change to an "integrated dry sump" design and variable valve timing.
In 2002, the standard Carrera models underwent a facelift. In addition, engine capacity was also increased to 3.6-litres across the range, with power up slightly on the naturally aspirated models. 2002 also marked the start of the production of the 996 based Targa model, with a sliding glass "green house" roof system as introduced on its predecessor. It also features a rear glass hatch which gave the driver access to the storage compartment. The 996 Targa is the rarest bodystyle in the series – only 5,152 were produced (all Mk.2 generation) between 2002 and 2005.
The flat six in the Carrera 996 was a newly-developed flat-six engine that offered 300 hp. It was mated as standard with a six-speed manual. A 5-speed automatic (Tiptronic) with manual override to shift gears was on the options list. As always, the Carrera 2 was rear-wheel-drive. Designed as a grand tourer, the Porsche Carrera Cabriolet was the base version for the open-top 911 range in 1998. The retractable roof was able to be stowed away in 20 seconds at speeds of up to 50 kph (31 mph), like the rest of the 911 convertible range. With the roof up, the car was tested in the wind tunnel at speeds of up to 338 kph (210 mph).
The 996 was initially available in a coupé or a cabriolet (Convertible) bodystyle with rear-wheel drive, and later with four-wheel drive, utilising a 3.4 litre flat-6 engine generating a maximum power output of 221 kW (300 PS; 296 hp).[7] The 996 had the same front end as the entry-level Boxster. After requests from the Carrera owners about their premium cars looking like a "lower priced car that looked just like theirs did", Porsche redesigned the headlamps of the Carrera in 2002. With the cabriolet, buyers have a choice between this version and the hotter Carrera 4S cabriolet.
2001 Porsche 911 GT3 RS Race Car (996) (2001 - 2004)
In the 2000 FIA GT Championship, the 996 GT3 R was the dominant racer in the new N-GT class and won every run. In the same year, the factory-supported Phoenix Racing won the 24-hour race at the Nürburgring. In 2001, the modified version, now called the 996 GT3 RS, was used. The vehicle was not only very successful in its class, it also achieved overall victories. Modelled on the 911 GT3 R, the GT3 RS race cars offered a number of technical improvements, which combine to ensure a racing car with optimal competitiveness. 50 racing cars were produced.
Based on the road-going 996 911 GT3 RS, the GT3 RSR features improvements to its predecessor in all key areas. The vehicle is available in an ACO (Automobile Club de l'Ouest) version for competing in Le Mans and in the American Le Mans Series as well as in a FIA specification. The 911 GT3 RSR features a modified front which improves downforce at the front axle. The 3.6-litre, six-cylinder boxer engine delivers 445 hp at 8,250 revs. Maximum torque is now 405 Nm at 7,200 rpm, with top revs reached at 8,500 (for the FIA specification with two 30.8 mm air restrictors). Race cars never got more exciting than this.
Porsche 911 Turbo X50 (996)
The optional X50 Performance Package gave the base Turbo larger K24 turbochargers and intercoolers, a revised ECU and a quad-pipe exhaust, raising the engine’s output from 415 to 450 bhp and maximum torque from 415 to 457 ft lbs. With power at 450 bhp @ 6000 rpm and torque of 457 ft lbs @ 4400 rpm, the X50 option is a monsters. Porsche engineers achieved the increase in power and performance through modifications to the Turbo charger, the change air cooler, the control units and exhaust system in particular. The base constructions of the manual and automatic transmissions were also improved.
The 996 GT3 RS was a sharpened version of the Mk.2 GT3, built for track use and it was the homologation model for the GT3 race-car. It was the forbidden fruit for the U.S. and Canadian customers. It was available in a limited number and it was a true track-oriented vehicle. It was based on the GT3 version, but with fewer comfort features and even stiffer suspension. It was the kind of car which could have been taken from the shop and dive into the first race-track. The GT3 was available in white color only, with red or blue inscriptions on its sides. The adjustable rear wing and the “duck-tail” were mounted in the back, to provide better traction on higher speeds. It was fitted with the same engine as the GT3.