hey guys, im new to my cobalt ss/sc and cant decide what size pulley i want to upgrade to. i found a few stage kits on cobalt addiction.com although i was hoping some one else out there has added a stage kit and can give input. As of now i have a full magnaflow exhaust system and a K&N Intake. The stage #3 kit comes with lucas #42 injectors, the injector harness, spark plugs, a GM Shortened Belt, a power re-tuner, and a 2.7 Pulley + all the installation equipment. So yah guys... help....?

 

with that 2.7 you would be maxing the duty cycle of those 42# injectors just to let you know

 

I would advise not going smaller than a 2.8, that will make plenty of power until you start to do more serious modifications.

 

the cobaltaddiction.net or .com site has different packages...... the pulley sizes are included along with the pack....