Anyone know what would happen if I left my Eibach Pro-Kit on the rear and put my Tein H-Techs back on the front? Would this cause problems of any kind like a very bizarre ride to the car or anyrhing?

 

The front springs would be linear while the rears would be progressive which may make the rear roll more in turns which may upset the handling of the vehicle. Its hard to say to what extent this would occur and if you could live with it or not