0_4044 Charged carriers in partially filled Landau levels in a double layer quantum well can bind to form magnetic excitons across the insulating layer. For complementary filled electron-hole Landau levels in the double layers, insulator magnetoexciton condensation can be produced, demonstrating superfluidic exciton flows without a quantum Hall edge state. We report the observation of the electron-hole bound magnetoexciton insulator state in two layers of graphene separated by a few nanometers of hexa-boron nitride under strong magnetic fields. We observe that the conduction in the first graphene layer vanishes when the second graphene layer is open-circuited. However, when the circuit of the second layer is closed, the first layer becomes conductive and a perfect drag current is induced in the second layer. In the counter-current geometry, we observe vanishing longitudinal and Hall resistances, which is indicative of the superfluidic transport of the charge-neutral magnetoexciton condensate. Using gate voltage and magnetic field, we study the condensate phase diagram as a function of temperature and magnetic field, which control the exciton density.