About a week ago I had the Eibach Pro Kit put on my car with stock shocks. Tonite I took off from a stop sign and was giving the car enough gas to spin out. Instead of spinning out the back end of the car shook pretty violently and no spinning occured. What happened? I assume its got something to do with suspension since it never did this before the springs? Please help me out

 

My guess would be that the stock shocks can't properly dampen the new springs and you are now getting wheel hop instead of a smooth burn out.

 

what will fix this problem?

 

A new set of Bilstein HD's would be where I would start. They are valved to hadle the stiffer springs much better than the stock units.

 

If I put Bilstein HD's just on the back will it solve the problem?

 

The honest answer is I'm not sure but my educated guess is that shocks are your problem. I had hoped that someone else might chime in with some personal experience but so far that's not the case. Anyone else have any insight on this?

 

Unless you can find something broken or loose (there's not too many places to look), I agree. Make sure your torque arm bushing is still there.