The Thomas Saf-T-Liner C2 (often shortened to Thomas C2) is a cowled-chassis school bus manufactured by bus body manufacturer Thomas Built Buses. Introduced in 2004, the C2 marked the first usage of the Freightliner C2 chassis. While produced largely for school use, the C2 is also produced for multiple applications, including specialty and commercial configurations. The C2 is unique in that it is available in capacities up to 81 passengers, the largest of any type C conventional school bus in current production. It is also the only school bus in North America with the option of a manual transmission.