I have the same Koni track bars on the rear. When I restored my 1964 MK1 Tiger, I didn’t know much about these and installed them again. The previous owner used to drag race the Tiger. Maybe he installed them?? But I also have a “competition Cobra 289” engine in a MK1, which is even mentioned on the window sticker which I have. It was an additional $600. That’s all I know about them.