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