If you were to get a turbo for your car you would take the header off and not use it. It would be replaced with a turbo manifold.
So, to answer your question... if you're really considering a turbo it would be a waste of money. Not to be too harsh, but it sounds like you've got a lot of researching to do before you should consider the turbo.
So, to answer your question... if you're really considering a turbo it would be a waste of money. Not to be too harsh, but it sounds like you've got a lot of researching to do before you should consider the turbo.