FWIW I have a '14 Nismo and replaced the springs with Swift's, then went to coil overs. I like the stock Nismo springs better than the Swifts. While stiff I found them more responsive and predictable and less mushy than the Swifts. The coil overs are far and away a better ride if you're looking for performance - it's really no comparison.
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2014 370Z NISMO -- HKS Hi-Power Exhaust -- Swift Springs -- BC ER Coilovers -- SPL Suspension Components -- Nismo R-Tune Intake -- Seibon BD CF Hood
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