and a roll cage. They also came with optional lights on the visors. A later ultra-limited production version, the Carrera 3.8 RS featuring the Turbo body and a 3.8 litre version of the M64 motor was sold briefly in Europe. This engine was bored out by 2 mm for a total of 3,746 cc, and was also available in a more powerful competition version called the 3.8 RSR. The Carrera RS was not sold in the United States because Porsche Cars North America felt the car's aggressive tuning was not suited to the American market. In 1992, 45 US-legal cars that were very similar to the Carrera RS were imported to the US for a proposed "Porsche Carrera Cup" racing series. This Carrera Cup series was to function as a support race for the American CART racing series just as European Carrera Cup has supported Formula One. These 45 cars were identical to a Carrera RS other than having airbags (with required electric windows), alarm system, American lighting, American bumpers, aluminum wheels, and standard seats. The cars otherwise had the lightweight seam welded chassis, lightweight interior trim, aluminum hood, lightweight door glass, suspension, brakes, G50/10 transmission and M64/03 engine etc. of the Carrera RS. These cars were approximately 200 pounds (90 kg) lighter than a normal US Carrera 2 model. The plan was for Andial, the then equivalent of what is now Porsche Motorsport US, to convert these cars to full racing specification, however, due to lack of sponsor support for the Carrera Cup series, it was cancelled before it began. The 45 cars imported to the US for this series were then sold, quietly without any advertising so as not to compete with the new RS America, through normal dealer channels. These cars were supplied with a dash plaque which indicated that they were the "Carrera Cup US Edition". In order to please devoted American 911 enthusiasts who wanted an RS model, Porsche produced the RS America. The RS America was produced as a model year 1993 and 1994 car based on the US Carrera 2. The cars were offered in standard colors red, black and white and optional colors midnight blue metallic and polar silver. Several paint to order cars were manufactured in speed yellow. The RS America featured a distinctive "whale tail" spoiler, a partially stripped interior with flat door panels (from the European RS) and carpeting