I was told they are just as good as Eibach, they're cheaper and fit right in place of the factory spring's. What does everyone else think? Or should I spend the extra money and go for Eibach's. Also, which is better, the K&N Filter charger for our cars or the K&N AirCharger for the Eclipse's. Will an AirCharger fit on my 93 Stealth RT NA? Thanks Ahead!!