it depends how if you wanna stay n/a or FI, intake, plemum, headers, hfc, exhuast, reflash in the 370z should get you around the 320-330 whp range, but why waste the money on a bunch bolts on save your money and go twin turbo... the twin turbo g37s are gettin 450+ whp on low boost and you can always tune and build the block and get insane hp numbers
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G37S 6MT MODS HERE AND THERE 
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