I got about 120K out of the last set of Bilsteins. But they were long gone by the time I actually replaced them. Have about 30k on the current Falcons with external reserviors. Which are rebuildable. But I don't love them. Probably end up replacing them with something better before they actually get shot. Or just save a bunch of money and go back to the Bilsteins again after the Falcons need rebuilding.