vibration after spring install?
 

I recently installed the Eibach ProKit and now have a slight vibration at the rear of the car above 55mph. It didn't exist before the springs were installed and I had an alignment done the day after putting them on. It isn't terrible but definitely noticeable.

Has anyone else experienced this after installing lowering springs?

I also have aftermarket wheels and tires so I intend to put the stock set back on and see if it still vibrates. I guess it is possible to have coincidentally lost a wheel weight at the same time. I haven't had them checked for balance yet -I figured I would try the stock wheels first and if it still has the problem I could eliminate wheel balancing as the issue.

Any input would be appreciated.

Check your wheels to see if there is a spot where the used to be a weight. They use stick on weights so there would probably be some glue left behind or maybe a clean spot in the shape of a square.

~60mph is often a wheel balance issue. I am running sportlines and don't have that vibration.

Thats what i was thinking too, a high speed vibration is usually a wheel balance issue. I should be able to identify that (or rule it out) by switching back to the stock wheels this weekend.

make sure you got your lugs torqued down bro

yup they are 85 lb/ft