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socal is right- just doing bolt ons wont place enough stress on your engine for you to have anything to worry about, even without a retune it will be just fine. you can expect MAYBE a 15-20%HP increase with bolt ons if your lucky, though honestly it will probably be closer to 10-15%. lets put it this way, theres turbo kits that are designed for completely stock engines that do just fine, and they add on as much as 40-50%HP.

They're pretty strong engines and can handle a good amount of power increase with stock internals, but eventually to hit the engines full potential you do have to upgrade internals.

Don't worry about horsepower and if it can handle it with just I/E/H setup, those 3 bolt-ons don't add enough horsepower to hit anywhere near the engines breaking point.

you have fantastically lots achieved as much as you could surprising now. understand that that motor and transmission became never geared up with overall performance in strategies. including a supercharger or turbocharger provide you greater skill, yet will placed further stress on the internals of the motor that it is not designed to stand up to. to pass quickly like oyu want in that vehicle you may ought to replace each and all the internals of the motor to stand up to the further abuse. then you definately ought to verify how lots enhance the block can take ahead of blowing a headgasket then you definately ought to enhance the transmission to deal with the further skill from the motor. this is greater concern than this is nicely worth. Your ideal wager may be to get a vehicle that's geared up with overall performance in strategies to start with. this is going to be lots greater much less costly and much less stressful that way. i might propose an 06-07 supercharged Cobalt SS.