C43

C43, C-43 or C.43 may refer to:
 * Alfa Romeo C43, Formula One car
 * Beech C-43 Traveler, an American biplane
 * Bill C-43, several bills of the Parliament of Canada
 * C43 road (Namibia)
 * C43 torpedo, a Chinese torpedo
 * Caldwell 43, a spiral galaxy
 * Caudron C.43, a French biplane
 * Hiram Cure Airfield in Eaton County, Michigan
 * Marshall C43, a British bus
 * Melanoma
 * Mercedes-Benz C43 AMG, an automobile
 * Petrov's Defence, a chess opening