This is both sides... one car... it's a rear lower pair of specifically desgned "Lakewood" 1982-92 Firebird TA & Camaro rear lower control arms manufactured from heavy gauge steel tubing for strenght, eliminationg flex that is common with F body arms.
Coupled with this is the use of Energy Suspension Polyurethane bushing for added rigidity.. that you can grease up too.
They bolt up quick and easy.. to the stock mounting point.