This Ferrea Single Valve Spring Kit upgrades the valvetrain on the 2015-2024 BMW S58 twin-turbo inline-six with single springs designed for improved valve control over stock at elevated boost and rpm. Sold as a complete kit.
| Type | Single valve spring kit |
| Application | BMW S58 (2015-2024) |
| Use | Boost / high-rpm valvetrain upgrade |
| Part Number | KT4059 |
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Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
