Have a 2010 2LT, 2.4L, auto, w/ rear drum brakes, thinking of converting to disc.
Does anyone know if such a kit available?
Also would like to make dual exhaust!

 

Been discussed here before. Seems the opinion was to get the parts from an
"SS" donor car.

 

Related to "dual exhausts"....the search function is your friend, my friend. Here is one of the first and there are many others using different methods.

https://www.chevyhhr.net/forums/show...=dual+exhausts


You'll find a number of threads on the adding the rear disks as well...as far back as mid to late 2006.

 

I believe there was a thread where someone removed the whole rear suspension from a Cobalt SS and it bolts right in. Not sure if they did anything to change the proportioning or not.