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The 993 Turbo S, available between 1997 and 1998, bumped the power from the standard 993 Turbo up to 450hp (430 for the United States market) with larger turbochargers and a modified engine management system. The Turbo S was fitted with more luxury trim bits on the interior – with more leather and carbon fiber than on the standard Turbo. A larger rear wing was installed as well. Only 345 were built. Its direct successor was the 996 Turbo S for model year 2005.
The 996 Cabriolet was introduced in March 1998 at the Geneva Motor Show. The 996 Cabriolet was long ready (remember, it was tested already in 1995), but for marketing and production-related reasons it was launched in 1998 as a 1999 model. While the evolution with the 911 coupe was questionable from 993 to 996, the real evolution came with the cabriolet. In USA - the biggest market - 911 Cabriolets outsold the Coupés. The all-wheel-drive system provides between 5-40% of torque to the front wheels depending on the situation.
If the 996.1 911 GT3 was all about the engine, in the 997.1 completes the rest of the formula. The surgical clarity of its transmission, steering, brakes, pedal weights and heights, and overall chassis balance represented a clear step-change from its regular 997 911 siblings. But the engine was still the heart of the car, the water-cooled 3.6-liter flat-six boasting a new intake and a new exhaust compared with the 996 versions. Official output was 415 hp, though insiders admit some engines made close to 430 hp. Launched in 2006, today this is in many ways the sweet-spot GT3, way more affordable than the later 4.0.
Like the rest of the GTS lineup, the 991.1 Carrera GTS Cabriolet is essentially a kind of 991 Greatest Hits package, hand-picking some of the more desirable components and options from the 911 range.  It gets Porsche's PASM (Porsche Active Suspension Management), Sport Chrono with Sport Plus, the Sport Exhaust system, and a ride height that's roughly four-tenths of an inch lower than non-GTS models. It also gets a version of Porsche's 3.8-liter flat-six with 430 hp, hits 60 mph in 4.0 seconds equipped with the PDK (4.4 to 60 mph for the manual), and tops out at 189 mph.
The 996 Carrera 4S Cabriolet is the convertible version of the slightly-uprated 996 Carrera 4. Introduced a year after the 996 C4S Coupe. The Carrera 4S Cabriolet was introduced in the lineup with the new engine and the Turbo bodywork. The cabriolet version of the Carrera 4S paired the aggressive bodywork and suspension of the Turbo with the base Carrera 4 drivetrain, though it didn't get the Turbo's huge rear wing. The three-layer canvas-top was powered and it needed 20 seconds to completely retract or cover the car, at speeds up to 50 kph (31 mph). For winter, the car featured an aluminum hard-top.
All Porsche 911s are turbocharged these days but the Turbo model is something special. It gets the twin-turbo 3.7-liter flat six with tons of power and a huge $33,000 savings over the Turbo S. Thanks to an output of 573 hp, marking an increase of 32 hp over the predecessor, the new 911 Turbo Cabriolet accelerates from 0 to 60 mph in 2.8 seconds (0.2 seconds faster than before). The Turbo Cabriolet basically handles like a coupe.
Porsche is the most successful marque in the 24 Hours of Le Mans and British drivers have played an important role in delivering these historical achievements, and in celebration of this success a special limited edition model – the 911 Carrera 4 GTS British Legends Edition was created. Designed by the drivers who took wins in the 24 Hours of Le Mans for the factory team – Richard Attwood (winner 1970), Derek Bell MBE (winner 1981, 1982, 1986, 1987) and Nick Tandy (winner 2015) – this model was developed by Porsche Cars GB and Porsche Exclusive Manufaktur.
Porsche developed the S/T, of which 33 were built in 1970 and 1971, taking full advantage of new FIA rules allowing a two-inch wider track. Accordingly, wheel arches were widened to accommodate seven-inch front and nine-inch rear wheels. Weight reduction was even more radical, including thinner-gauge steel for the roof and floorpans. Heating ducts, seat slide supports, the glove-box lid, ashtray, sun visors and rear torsion-bar covers were deleted.
In 1988, Porsche produced 875 examples of the CE or Commemorative Edition 911 Carrera in coupe, targa and cabriolet variants to mark the production of the 250,000th 911. Distinguishing features include special diamond blue metallic paint with color-matched Fuchs wheels, front and rear spoilers, and interior carpets and leather. These cars also featured Dr. Ferdinand Porsche's signature embroidered on the seats in the headrest area.