Yesterday I replaced my front suspension track arms due to wear, they chattered just like the rears did over small bumps and cracks in the road at low speeds.
It was a super easy install that does not require a write-up and has as many steps as changing your oil but alittle easier.
I used Che's (Delubozparts) adjustible Adjustible Track arms. Now my Boxster is very quiet on the road with no suspension chatter whatsoever. I also notice when im braking is much more responsive, could be placebo effect but it definatly feels more firm and tight in the frontend of the car.