Jsut for some for you guys on the Cobalt SS....be careful when running against some of them. Most people dont now but there is 2 Staged Packages for them...becuase they werent selling good the first year they came out and they where still slow...Chevy has made a 2g upgrade package for them that ups them from 170whp to 210whp....witha slight weight reduction...so if you have ever driven the Stage 2 version if you can ever find one...they move pretty quickly. Then with some upgraded pulleys and exhuast they can make a bit more PSI and about 15-20 more whp!!!! Just figured i would let you guys now!!!