With that info, unless they are not installed correctly (unlikely) or something was left loose, then I suspect the part is just faulty. I would contact the store where you bought it and have them order another one so they can exchange it when it comes in. More then likely the strut is not filled properly and when you are braking hard it is causing it to fully extend or bottom out and that is the clunking noise.
Did you change these out or did you have a shop do it? The only reason is, if you did it then I would suggest going back over all the bolts just to make sure they are tight as a loose bolt will cause a clunk as well.
Jul 12, 2020 at 8:43 AM