14. It was at this point we ran into our first snag. The new Eibach strut assembly (bottom) had a different thread pitch than the factory strut (and Eibach does not include hardware with the struts). You can also see there is an unthreaded shank on the Eibach unit that the factory did not have. Because of these two problems, the new strut would not fit into the factory strut mounting plate.