[Dave at Pelican Parts]

Actually, the only difference between L and R torsion bars is the letter stamped into them. Period.

The reason that they do that is torsion bars will take a "set" when used to resist force in one direction for a long time. Stressing the bar in the other direction can result in failure of the bar. So, while the bars are identical when new, they are labeled so that you put them back where they came from if and when you pull them out.

And yes, the sway bars are stressed in both directions, depending on which way the car is turning at the time. So they don't really take a "set" and you can put them back in any which way you like.

--DD