- The torsion bar spline fits the leading edge of the control arm
- The 914 torsion bar spline is smaller diameter than the 911 one
So the 911 arm is not identical to the 914. I see in PET that the part number for the 914-6 control arms match the 911.
I'm posting it because a reliable 914 source locally has told me that they are interchangable (911 / 914-4) but I didn't believe so.
Thanks to anyone who can clear this up.