Stellar evolution mass tracks for NY Hya A and B showing the temporal evolution of model radii and T_effs between 1 and 7 Gyr that include magnetic inhibition of convection. Mass tracks are computed with different values of the surface magnetic field strength, B_surf = 900,  1000,  1100,  1200 G. Increasing surface magnetic field strengths leads to larger model radii and cooler T_eff values at a given age. Panelsa, c, e, andg are computed with M = 1.160 M_⊙ for NY Hya A, while panelsb, d, f, andh are computed with M = 1.168 M_⊙ for NY Hya B. Solar metallicity models are shown in panelsa–d and super-solar metallicity models are shown in panelse–h.