September 13, 2007 the Ultimate Aero became the world's fastest production car as certified by Guinness World Records with a top speed of 256.18 mph averaged over two runs in opposite directions. SSC Ultimate Aero XT In 2013, SSC North America announced they were going to produce a limited number of SSC Ultimate Aero XTs. This vehicle was an upgraded Ultimate Aero and included many features from the Tuatara (Concept). These features include a 1,300 horsepower version of the Tuatara twin-turbocharged V8, a 7-speed Tuatara paddle shifter transmission, and upgraded cooling, fuel, and braking systems. SSC Tuatara The SSC Tuatara is currently in production at the SSC North America assembly facility in Richland, Washington. The vehicle is the result of a design collaboration between Jason Castriota and SSC North America and was titled the "Crown Jewel" of the 2011 Dubai International Motor Show. The car made its debut at the 2020 Philadelphia Auto Show. The vehicle is limited to 100 examples. On October 10, 2020, driver Oliver Webb allegedly broke the production car speed record in the SSC Tuatara with a top speed of 331.15 miles per hour and a 2-way average of 316.11 mph on a closed public roadway with street tires and non-race fuel. The claim, however, has since been disputed by several sources who analyzed the video and information given from SSC North America and have since made claims that the top speed run was illegitimate. On January 17, 2021, Tuatara owner and non-professional driver Larry Caplin officially broke the speed record for fastest production vehicle with an average 2-way average speed of 282.9 mph on a 2.5 mile stretch of runway at Kennedy Space Center's Shuttle Landing Facility. The claim was verified by Race Logic, with a technician onsite to install and analyze the data. SSC has stated that it plans on continuing high speed testing to validate the top speed of the Tuatara and hopes to be the first production car to reach and surpass 300 mph. Facilities SSC North America is based in Richland, Washington, where its assembly facility and corporate offices are located. References External links Official web site Car manufacturers of the United States Sports car manufacturers Electric vehicle manufacturers of the United States Car brands Manufacturing companies based in Washington (state)