fantomas - They will work fine on the OBS' as I am currently running the springs on my OBS and have not had any serious back end drag with a full load in the trunk.
kainam00 - This is totally dependent on what else is done to the car. It is hard to control as there are variances between cars and models.
jurzeyfresh - We did not want to drop it too much as we were more concerned with suspension geometry and optimizing that versus slamming it. The drop is very minimal but it does drop it compared to stock. It is very similar to the drop of that of the red P1s.
Going to close this thread, but will continue the group buy pricing on the springs. PM us if you have any questions about these springs.