These Ferrea Alloy Single Valve Springs upgrade the valvetrain on the 2017-2020 Honda Civic Si (L15 turbo). They measure 21.35mm OD x 14.98mm ID and are made from high-quality alloy spring wire for improved valve control. Sold as a set of 4.
| Type | Alloy single valve springs |
| Application | Honda Civic Si L15 (2017-2020) |
| OD | 21.35 mm |
| ID | 14.98 mm |
| Quantity | Set of 4 |
| Part Number | S10182 |
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