I checked this up a while ago...
Bell 206B cannot be certified IFR because Bell doesn't have an STC which allows it (nor does anyone else). I fly a B206BII that has everything needed - except the dual generators - including autopilot. It is approved for "IFR in VMC", not "IFR in IMC". It's great if you get caught in marginal weather - just engage the autopilot, go above and shoot an ILS at the nearest runway
