This Ferrea Dual Valve Spring Kit upgrades the valvetrain on the Nissan GT-R (VR38DETT twin-turbo V6) with dual springs built to handle boost, high rpm, and aggressive cam profiles. Sold as a complete kit.
| Brand | Ferrea |
| Type | Dual valve spring kit |
| Application | Nissan GT-R (VR38DETT) |
| Part Number | KT4015 |
| Use | Twin-turbo / high-rpm valvetrain upgrade |
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