Unless you plan on turning the Z into an all out track machine, I would just work on the suspension and do some bolt ons for engine performance.
Since mine's a daily driver (well most of the time) I need it to be as reliable as possibe. And as Kenchan said, the Z is plenty fast for the street. Theres no need for FI on a street driven Z unless you just need to feel like you can beat almost any car that rolls up on you imo.
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some mods
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