Hay I got this from SLP today and thought I would pass it on.

Darrell,

SLP is looking into the possibility of developing an exhaust for the Cobalt
SS but it is not definite at this time. We are listening to our customers
and if there is a big enough demand, we will certainly work on it. Sign up
on our mailing list for all of our latest news.

Regards

Team SLP

Take a look at what they have done to some other cars SLP website