Does anyone know if the hub from the Cobalt and the GTP are the same or are they different? because they offer a 3.25 pulley which i want for my cobalt, and its only for the GTP, can i use that pulley and i know it would only sue 6 ribs on the pulley, and also, could i put the ecotec specific 2.8 pulley on that hub also? since i am getting that too

 

you can go with the 3.1 on a stock tune safely.

 

ahh idk if i want a 3.1, its cutting it close, wouldnt it?

 

yes. very.. but if you only had an intake and exhaust, you should be ok.
(idk what mods you have already)

 

they are the same hub

 

yeah i have intake and exhaust, but stock header thats all, so a 3.1 would be safe? now im thinking of doing it