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Okay, this is especially for Bartkat. I realized that I had not responded to what happened initially with the problem of the spring perch collapsing from koni. The install was absolutely not the problem and was verified with Koni. To fix the situation Koni sent me there coil over sleeves to replace the spring perch. As well, I had to replace the Eibach springs to fit the new coil over perch. Eibach was more than happy to send me two new ERS springs with a much higger spring stiffness. They are rated at 450. To give you an idea on how much more stiff that is over the Sportlines they are rated at 225. Since that post and the corrected parts from Koni I have had absolutely NO problem what-so-ever with this setup. Needless to say, the experience has changed my perception of Koni. Thank goodness that Tein has been released. By the way Bartkat, I have been in the automotive industry for 6 years now and currently work for Titan Motorsports. Being a newbie doesn't mean you don't know what you are talking about. It only means you have just registered with the site.