Bilstein B6 Rear Shock
Fits Cobalt, Ion, and HHR. Sold individually.
Great product and awesome shipping.
These were recommended by a friend. A total change in handling. Went from Cobalt sedan to race car in a couple of hours. Paired with Moog struts up front and ZZP lowering springs. Gives a really stiff ride/great cornering.
I have not yet used the Bilstein shocks I purchased. It is still winter here. I will be driving the Cobalt within 30 days.