I have Eibach front and rear sway bars on my 2013 WRX 5-Door. The front bar fits great. The rear bar can only be used on it's stiffest setting. It's physically impossible to connect the endlinks to the holes for the softer setting. I've tried with both the stock endlinks and Kartboys.
As this is my daily driver (on terrible roads nonetheless) I would like to go softer. Has anyone had experience with sway bars on a 2013? I'd like to buy a different rear bar (Perrin, Whiteline, Cobb, etc) but don't want to spend more money and end up with the same problem. Thanks!