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I'm not sure how beefed up the internals are in the N/A version of the 4G63. I wouldn't go over 7 PSI on your stock internals. To install a turbo you will need the turbo, piping (mandrel bent), oil lines, boost controller, and a fuel management system. Those are the bare essentials. If you want to run more boost you will want to replace the crank and connecting rods with forged ones. You will want some lower compression pistons, between 8:1 and 9:1, cast pistons will be fine. You might also need to replace the sleeves. You will also want a good intercooler otherwise you will get detonation after a certain boost level. You're looking at a lot of time and money also if you have an automatic, in my opinion, you would be wasting both.
Your best option is to swap a 4G63 from a TSi, GSX, GS-T, or ES with all the needed items. It will cost less money and work a lot better. It is better to start with a turboed motor from the factory.
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