Crate engine Depot has the only kit I know of but its not for a cobalt. It a cavalier supercharger kit designed for an Ecotec. You'd need to do something about the computer though because the ECM's are vastly different. Heres a link
Ecotec 2.2L Cavalier/Sunfire Supercharger Kit 17800003 - Crate Engine Depot
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2006 LS coupe, manual, Victory Red
Sportlines, FE5 struts, shocks, front swaybar, Progressive 22mm rear swaybar, Airlift load assist rear airbags, TWM ST shifter, smoothed TB, LSJ exhaust, debadged, demudflapped, Yokohama AVID Touring P195/60R15's. Soon to come 17x7 Motegi Tracklight 1.0. Best to date 15.402 at 90mph
"No friend ever served me, and no enemy ever wronged me, whom I have not repaid in full."
Lucius Cornelius Sulla
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