This Ferrea Single Valve Spring Kit upgrades the valvetrain on the 2017-2018 Audi 2.5 TFSI (five-cylinder turbo) engine 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 | Audi 2.5 TFSI (2017-2018) |
| Use | Boost / high-rpm valvetrain upgrade |
| Part Number | KT4042 |
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Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
