I Can't Seem to Find the Info I'm Looking For.
Hey guys, I'm looking to add some power and aggression to my cobalt and really don't know where to start when it comes to the internals. I want to get bigger cams, new valves and springs, but my car is also my daily driver and I don't want to kill my gas milage too much. I'm mainly looking to rebuild the top end of my engine and leave the bottom alone (pistons, push rods, Franck) where could I start with this and who would be a good place to take it too to get a tune? Any help would be great. OH!,almost forgot, its a 2007 4door with the 2.2l and manual trans. thanks