Hi. I got a 2008 Cobalt Sport 2.4 l with a 5 speed manual tranny. The upgrades so far have been: 1) K&N air intake; 2) GM performance exhaust; 3) Turbonator thingie in the air intake. I've joined the forum to see what else i can do to increase power and acceleration. The next projects are installing a performance air sensor and either buying a chip upgrade (JET) or dyno tuning the ECM. I also own a heavy highway truck (2004 International 9400 with a 15 l CAT) and after I did a Performance Dyno the engine feels totally different - the truck now makes 550 HP and 1900 lb-ft of torque at 1425 RPM! I've tried to find a dyno shop that can tune my Cobalt's ECM but have not had much luck so far... I'm in Ontario, Canada.