This may be more information than you were looking for, but here it is ....
Here are the measurements for the torsion bars, I think these are very close, but the two measurements are an apple & orange comparison.
The short bar is 41" or 104.14 cm
The long bar is 42.9" or 109 cm
The short bar is currently not installed, so I was able to measure just the bar itself.
Unfortunately I can not accurately measure the long bar now that it is installed as the mounting hardware makes that impossible - and it is was a battle to install it.
The long bar was measured by the seller whom I bought it from; see photos.
However, his measurements are not of "just the bar" but from the extremes of the mounting hardware, the distance between the mounts on the hood - so his 109 cm is a bit longer than just the tubes themselves.
However, before installing the long bar in my E9, I did take a photo of the difference in length of just the two bars. I would approximate the difference in their length to be closer to 1.25" or 3.2 cm, not the 2" or 5 cm from the two measurements above.
I also have photos of the short bar with spacers installed (which did not work well at all!!) and the long bar installed, which was a very snug fit and took a little banging to get it in place. I have also included a photo of the arm welding repair that was done to the shorter bar.
I have no use for the short bar, if you could use it LMK
Hope this helps!