Hi Damian. I bought these coil overs in the beginning of April 2014, I think they maybe faulty. For example the ride has become extremely hard, over the last month or so, and there seems to be knocking coming from them, as if they cant keep up with bumps etc. Also if I leave the car idle for a while and push down on the suspension (front wing) it goes up/down as it should, but only once or twice then it goes rock hard? Regards Tom.