I went back and found some of my comments I shared with Hellwig:
The diameter of the Hellwig bar is 22mm and the OEM bar is 22mm
The weight of the Hellwig bar is exactly the same as the OEM bar - both indicated 10.6 lbs on my digital bathroom scale.
The Hellwig bar bolts to the end links in exactly the same manner as the OEM bar.
The Hellwig center bushings are approx 3” high the OEM bushings are approx 2” high.
These bars appear very similar so I was somewhat skeptical about any improvement - but I was pleasantly surprised - I don’t know if there is a difference in the steel or if the urethane center bushings you provided are much improved vs the factory rubber bushings? In any event it is cornering flatter than the OEM bar.
And note this is on a Timberline - I don't know the specs on a non Timberline Expedition.