The Porsche 911 Carrera 4 Lightweight was a limited production variant of the 964 Carrera 4 that was introduced in 1991. The Carrera 4 Lightweight, also seen in German as Leichtbau, was created to build a highly capable car that was almost a race car for the road. These cars saw extensive weight saving that included the use of aluminum and fiberglass, fixed windows, and a fixed spoiler (as opposed to the speed adjustable spoiler seen on standard Carrera 4 cars). Just 22 examples of the 964 Porsche Carrera 4 Lightweight were built before the variant was discontinued in 1992.