A panhard rod is the lateral linkage is what keeps your rear axle centered from side to side. Your stock panhard rod does a perfectly fine job of doing this unless it has been bent, or if your spider is lowered.
This panhard rod is constructed of chromoly steel tube, and has forged rod ends with Polyurethane bushings. It can be adjusted without removing it from the car.
We ship these rods adjusted to the length of the stock rod, and with the bushings pre-greased.
Polyurethane bushings should be periodically cleaned every couple years and lubricated with a silicone grease that is advertised as being safe for polyurethane bushings. Petroleum based greases should never be used on poly bushings.