You won't get more than 300-330whp (depends on the dyno) with bolt on's. Forced Induction is a different animal altogether as you probably know already. As with anything, your limit will be whatever you can afford. The parts and upgrades for the Z tend to be a bit more than most cars, so I'd keep that in mind if you're on a tight budget. A Twin Turbo setup will probabaly run you at least $10k-$15k depending on the kit and shop that installs it.
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[09][MB][6-Spd MT][Touring][Stillen Gen III][K&N][Borla CBE][Evo-R]
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