This Ferrea Single Valve Spring Kit upgrades the valvetrain on the Nissan GT-R (VR38DETT twin-turbo V6) with single springs designed for improved valve control over stock at elevated boost and rpm. Sold as a complete kit.
| Brand | Ferrea |
| Type | Single valve spring kit |
| Application | Nissan GT-R (VR38DETT) |
| Part Number | KT4016 |
| Use | Boost / high-rpm valvetrain upgrade |
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