This is the rear knuckle bearing replacement for the JZX90/100 where the traction link mounts in the rear.  It is a rubber bushing from the factory and tends to get beat up from high HP cars or cars with age on them (hello, it's like 30 yrs old)

Replacing this bearing will have a big impact on traction and response in the rear end since it takes so much of the load at launch and allows the traction link to locate much faster because there is no bushing holding it back.

These  3PC precision bearings have a PTFE liner for longer life and they keep the debris from entering the joint. 

Sold as a pair of 2.