rear control arm or rear track arms.

[RandallNeighbour]

I was just about to post this link for you when you beat me to it!

Porsche Rebuilt Control Arm - Rear Track Arm: Steering and Suspension &amp Control Arms and Related Parts

Do note that going from rubber bushings to polyurethene bushings is not going to increase your comfort, but decrease it a little with every suspension part you put on the car with poly vs. rubber. Upside is it lasts a lot longer.

[lavagate]

Randall

I stopped by the dealership today and the service manager who is a good friend walked me over to a 98 Boxster and showed me the suspension. I got a diagram and found out there are 3 components in this assembly related to the control arms.......control arms, trailing arms, and track rods....which I guess are also called track arms. The track arms look considerably longer and run front to rear of the car parallel to the car. It appears the track rods have a fork configuration on one end that bolts to god knows what. The rear of the track arm is attached to the control arms with the bushing clearly visible. He seems to think the track rod bushings are worn and also said this is what is normally replaced. Of course he would say since the dealer cost is $600 per track arm and 300 per control arm. He indicated the easiest diagnosis is to raise the car and it's clearly evident which component has worn. Thanks again. Vertex has track rods for $150 per unit and control arms for $105 per unit.