GSC Single Cylindrical Valve Spring Kit w/ Titanium Retainers – Subaru FA20 WRX / BRZ / FR-S / FT86 (GSC5756)
Affordable Spring Upgrade for Boosted or High-RPM FA20 Builds
The GSC Power-Division Single Cylindrical Valve Spring Kit is designed for Subaru FA20 engines found in the WRX, BRZ, Scion FR-S, and Toyota FT86. This full kit includes 16 cylindrical valve springs, 16 CNC-machined titanium retainers, and 16 spring seats—perfect for naturally aspirated or turbocharged setups that need more spring without overspending.
Precision-Matched for Consistent Performance
Each spring is nano-peened and batched to meet GSC’s seat pressure specs, ensuring uniform pressure across the head. The titanium retainers are lightweight and machined to tight tolerances for repeatable reliability and valvetrain stability.
Technical Specifications
| Setup | Coil Bind (in) | Install Height (in) | Seat Pressure (lbs) | Open Pressure @ 11mm Lift | Max Valve Lift (in) |
|---|---|---|---|---|---|
| Cylindrical | 0.782 | 1.279 / 1.283 | 89 / 88 | 182 @ 0.846" / 181 @ 0.850" | 0.433 |
Performance Limits
- Max RPM: 8,200 RPM
- Max Boost: 20 psi
Fitment Guide
- 2013–2020 Subaru BRZ 2.0L NA (FA20)
- 2013–2016 Scion FR-S 2.0L NA (FA20)
- 2017–2020 Toyota 86 2.0L NA (FA20)
- 2015 Subaru WRX 2.0L Turbo (FA20DIT)
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