I purchased Vogtland sport springs for my 99 cobra convertible. I have always been an Eibach fan but got a smoking deal on these so I thought I would try them. I absolutely love them. I can honesty say it rides better than before I lowered it. Car has 113k miles on it and the suspension is all stock besides the springs. I had the car re alligned after install but did not install CC plates or anything else. Also installed FTBR bushings while it was mostly apart. Anyone else been running these, it does not ride like a wash board or wear u out to DD it. I left all isolators on car and it dropped it about 1.5" all around. Can post pictures if I can find time. And yes the springs are purple.