Some people go with the trifecta tuning,but I wouldn't go with a supercharger at a junkyard though you can go to jbody performance and get a supercharger that they rebuilt for about 900 dollars,I believe a junkyard would charge at least 1200 or more.Get the basic modding out of the way though if you don't have the exhaust system,downpipe,header done already,but if you plan to go turbo then might as well wait until you get the turbo first,then the other stuff.Like me I don't want to go with the turbo since there is turbo lag also you have to rebuild the turbo each time to make it run again,as for supercharger I am not 100% sure if they need to be rebuilt each time like a turbo to make them run properly.
2006 Chevy Cobalt LT
K&N air intake system
Custom 2.5" dynomax exhaust system
B&M tranny cooler
stainless steel pacesetter header
5900k light bulbs
2.4 intake manifold