I can definitely tell the difference from before I installed the rear sway bar. I would highly recommend it if you are upgrading the suspension system.

The installation was easy, surprised how this bolt on fitted without adjustments. Small comment, I had to run an M12 tap thru the welded on nuts, the bolts got stuck on the paint in the thread of the nuts, damaging the thread a bit on the bolts. Add 4 spring washers in the future for safety

amazing, easy install its 4 bolts and you're off to the races, instantly better handling at high speeds definite must for anyone with alot of mods or a heavy foot.

Very easy to install using tie wraps to hold in place while installing. Have not driven it yet .

I drive my 09 SS daily but I like carving corners. I haven't done a lot to the suspension except OTTP control arm bushings & new stock struts and shocks. I recently installed weld in subframe connectors & I couldn't believe the difference they made. So I was researching rear sway bars as a next step to improve the loose rear end. I decided on the ZZP one because it's not as aggressive. So I thought it would be best for street. The other bars affered are too stiff for average street driving from what I gathered. A friend of mine pointed out it was on sale so I coouldn't pass it up. It took about 15 minutes to install. I used my floor jack under it to hold it up so I didn't have to fight it while I loosely bolted up one end. Then did the other side. Removed the jack & tightened it down. It literally took longer to get the car jacked up on jack stands & to get the tools out than it took to install. Once done I took the car out for a test drive on the curviest road close by. I can't believe the difference! I really didn't think that twist beam axle moved arund that much. I honestly thought the Cobalt just basically had no suspension in back other than up & down lol. I highly recommend this rear sway bar. As always shipping cost was fair & it got here quick.