GSC Single Cylindrical Valve Spring Kit w/ Titanium Retainers – Subaru EJ Turbo (GSC5743)
Reliable Spring Kit for Street-Driven EJ Builds
The GSC Power-Division Single Cylindrical Valve Spring Kit is designed for Subaru DOHC EJ Turbo platforms running S1 or S2 cam profiles. This full kit includes 16 cylindrical valve springs and 16 CNC-machined titanium retainers, optimized for daily-driven setups staying below 32 psi and 8,000 RPM.
Precision-Matched for Consistent Seat Pressure
Each spring is nano-peened and batched to meet GSC’s seat pressure specs, ensuring uniform performance across the head. The lightweight titanium retainers are crafted with unmatched tolerances for repeatability and reliability.
Technical Specifications
| Setup | Coil Bind (in) | Install Height (in) | Seat Pressure (lbs) | Open Pressure @ 10.5mm Lift | Max Valve Lift (in) |
|---|---|---|---|---|---|
| Cylindrical | 0.845 | 1.326 | 78 | 197 @ 0.913" | 0.420 |
Performance Limits
- Max RPM: 8,000 RPM
- Max Boost: 32 psi
Fitment Guide
- 2002–2005 Subaru WRX 2.0L Turbo DOHC (EJ205)
- 2004–2007 Subaru WRX STI 2.5L Turbo DOHC (EJ257)
- 2006–2014 Subaru WRX 2.5L Turbo DOHC (EJ255)
- 2008–2021 Subaru WRX STI 2.5L Turbo DOHC (EJ257)
- 2004–2006 Subaru Baja Turbo 2.5L DOHC (EJ255)
- 2005–2009 Subaru Legacy GT 2.5L Turbo DOHC (EJ255)
- 2005–2009 Subaru Outback XT 2.5L Turbo DOHC (EJ255)
- 1994–1998 Subaru Legacy Turbo 2.2L DOHC (EJ22T)
- 1992–1996 Subaru Impreza WRX 2.0L Turbo DOHC (EJ20G)
- 1996–2000 Subaru Impreza WRX STI 2.0L Turbo DOHC (EJ20K)
- 2001–2005 Subaru Impreza WRX STI JDM 2.0L Turbo DOHC (EJ207)
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