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I work for a Chevy dealer in denver where we put on a lot of Magnason supercharger kits on corvettes, trucks and SUVs. Anyways, I was talking to the Magnason rep and he told me in the next couple of months they will have an upgrade kit for the Cobalt SS and the Redlines that include a smaller pulley, a programmer, and an exhuast system to boost the HP to 275 HP. Don't have any prices yet.