Magnacharger used to make a S/C kit for the Alero, but I don't think they do anymore. S/C or turbo are really the way to go if you want more hp from a 3400. The engine can handle boost, but CAI, exhaust, porting, or just about anything else these guys will tell you to do will burn out a couple of heads. Or, the best bang for your buck would be a new cam. It's just a little tricky to get into the bottom of the motor, but can be done through the inner fender.
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