This Fab 9 housing on the right has been assembled with Chassisworks' suspension links for Chevy A-bodied vehicles. As you can see, the lower links incorporate a urethane bushing system, while the top links are adjustable, using a urethane bushing on the housing end, and a spherical bearing on the chassis mount end. With this system, it is possible to adjust pinion angle in the car (which basically allows you to "tune" the suspension). You'll also note that the urethane links on the lower bars incorporate grease fittings. If you've ever experienced the squeaks and squawks that accompany many urethane bushings, you'll certainly appreciate this feature.