JRVS Active Member Jul 12, 2015 12 0 Mexico City Dec 15, 2015 #1 Hello. I am thinking about upgrading the shock absorbers on my 2015 Leon Cupra 265HP. The first question is: is it a 55 or 55mm strut? then your best advice between Bilstein B6 and Koni Sport. I often use moderate to bad roads, and are not willing to lower the car. Thanks in advance.