The King Tiger made its debut in 1944, toward the end of WWII, and proved a fearsome foe to the Allies, with 150mm and 80mm armor on the hull front and sides respectively, and a powerful 700hp Maybach HL230-P30 engine. The first fifty had a Porsche-designed turret, but thereafter mass-produced King Tigers had an updated turret designed by Henschel. The L/71 88mm gun was upgraded from the Tiger I, and could defeat 170mm of armor from a kilometer away. Some 430 of these King Tigers were produced until the end of the run in March 1945, proving a constant threat to the end.