I'm not sure how old the shocks are. I've owned the car for almost a year now and it's been doing it since I bought it. The noise doesn't happen when going over bumps, only when I turn. This car was pieced together from what I can tell. It used to be built and raced from what I have looked up on the internet. Hell the guy that used to own it may have been a member on here. I could put the link with all the info with all the parts it had on it at the time to see if you guys recognize it.
No I don't have coilovers anymore. That was the previous owner that built it. They put it all back to stock now. The only things done to it are pi swap, aftermarket H pipe, Caster camber plates and it's lowered 1.5in all the ways around