shep wrote:
I can take a pick of what's behind my ARB bar if that helps.
Yeah if you can.
I suspect that there are removable mounts that hold the OEM crash pad behind the plastic bumper ( from what I can see on mine with an inspection camera

) If this is the case, then mounting a new bar will be far simpler than I first thought.
Airbag sensors are located 100mm behind the radiator on each "chassis rail", and appear to be triggered by G-force alone, so assuming there are no crumple zones in the crash pad mounts, a new bar should not interfere with their operation.