ONLY 55k miles? Dude, don't even bother. Unlike stuff like control arms, and springs, dampers wear out pretty quickly. If you were never to do any kind of track at all, I would say why not, but considering that you want to drive the car more aggressively than most people do, I'm going to say, don't bother. You will end up spending more at the end when you have to revalve them, had you bought a good new set from the beginning.