[chaudanova]

Originally Posted by dragonflyoh

I replaced my upper rear track arms, that were causing a clunk, with adjustable arms from Hardrace on my 55K mile 2003 boxster. The clunk is gone and the ride is much stiffer. Now I have a rattle that is audible when going over bumps at speeds under 25 mph. The rattle occurs from each rear wheel and appears to come from behind either the passenger or drivers head depending on which wheel is hitting the bump. I think the noise is being transmitted up by the shocks. Has anyone had such a problem after changing to the stiffer track arms? Any assistance would be appreciated.

Those arms shouldn't really make that much of a noticeable change as to what you're describing.

Double check that you have tightened down the locking nuts properly on the adjustable ends, and that they're not touching anything else.