had the necessary time to develop a turbocharged version of the 3.6 litre M64 engine, and chose to re-use the 3.3 litre engine from the 930, with several minor revisions that made the engine smoother, less prone to turbo lag and more powerful, with a total output of at 5,750 rpm. A total of 3,660 964 Turbos were built. In 1992, the 3.3 litre Turbo S Leichtbau (light build) was introduced. Some 25-50 units were planned, though this was later increased to 80. The standard Turbo model was modified to produce with bigger injectors and more boost and more aggressive camshafts and with a lightweight interior and limited "creature comforts" the Turbo S was one of the fastest cars on the road. With suspensions lowered by 40 mm, a front strut brace and manual steering, the Turbo S was geared towards performance. The Leichtbau requirement was achieved by deleting the under-body protection, soundproofing, air conditioning, power steering and rear seats, while further savings came from thinner glass, aluminium doors, a carbon-fibre luggage compartment and thinner carpets, the result being a reduction of 180kg over the standard Turbo. Production of the Turbo S Leichtbau began in July 1992 for the 1993 model year. Some sources state that Porsche ended up building six more cars than the 80 planned. Turbo 3.6 Porsche released the 964 Turbo 3.6 in January, 1993, now featuring a KKK K27 turbocharged version of the 3.6 litre M64 engine developing at 5,500 rpm and at 4,200 rpm of torque, produced only for model year 1993/1994, with fewer than 1,500 of them produced in total, making it one of the rarest and most sought after Porsches produced since the 959. A black 1994 MY was used in the Bad Boys movie, starring Will Smith. At the end of 964 production in 1994, the Porsche factory had some 90 Turbo chassis left. These were all transferred to Porsche Exclusiv and built as the very special Turbo 3.6 S, available either with the traditional 964 Turbo 3.6 body or with the exclusive flachbau 'slant nose' option. Option X83 (Japan), X84 (non-US) and X85 (US), the Turbo S Flachbau, was available in the US as a US$60,179 option on top of the base price US$99,000 Turbo 3.6. The flachbau option was available when ordering the no charge '36S' option '1994 Turbo "S" Model' at a price of $60,179. In addition to the