I did a brief search and found that eibach makes dinan springs, with that it seems that it will be cheaper to buy Eibachs and get some konis yellows.

What I was wondering if anyone knows if eibach makes the Dinan spings with a diffrant spring rate from the standerd eibachs...

Thanks

 

To answer your question simply, yes there is a difference in the spring rate between standard Eibach springs and the Dinan springs. To also note, when Dinan receives the Koni yellow shocks they do not just throw together a suspension package using other components. There is a lot of on road testing as well as dyno testing done with the setup to determine the best valving for rebound/compression of the strut and then in accordance they figure out what the best spring rate would be to accomplish the best handling characteristics for the specific car they are developing a suspension kit for.

So yes the spring rates are different. Being a Dinan dealer and having the two spring packages side by side in our shop the coil bend is also different.
Let me know if you have any questions and I hope this helps.
Thanks