not sure if you are referring to counterfeits or some other issues on coilovers, but speaking from personal experience, i never had any problems with Tein S-tech springs. my buddy has been running same springs over 8 yrs, he still loves the look and the feel. Eibachs are great choice as well, but like mentioned above, it all depends on how low you want to go.

 

i would go with the eibach pro kits IMO because i had them before on my IS300 and it rides like stock and gives a perfect drop no wheel gap nothing but like everybody says its your own preference goodluck with your decision