MK8 may refer to:
Mario Kart 8, a 2014 kart racing video game Kallikrein 8, an enzyme Mitsubishi Kinsei (also MK8), a 14-cylinder, air-cooled, twin-row radial aircraft engine Volkswagen Golf Mk8, the eighth generation of the Volkswagen Golf vehicle Mortal Kombat vs. DC Universe, the eighth main installment in the Mortal Kombat franchise