GSC Power Division High Pressure Conical Spring Set
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GSC Power Division High Pressure Conical Spring Set - Subaru WRX/STI (GC8/GDB)
GSC Power Division builds valvetrain components for engines that get pushed hard, and this conical spring set is designed for exactly that. Fitted to the Subaru WRX and WRX STI, it uses a true conical design to damp valvetrain harmonics far more effectively than traditional cylindrical or beehive springs, supporting higher RPM and increased boost without sacrificing valvetrain stability.
This listing covers the Subaru WRX (GC8) and WRX STI (GC8/GDB) fitted with the turbocharged EJ platform. SKU GSC5073 includes the titanium retainer and chromoly spring seat as part of the kit.
Key Features
- True conical spring design for improved valvetrain harmonic control
- Titanium retainer included
- Chromoly spring seat included
- Multi-step heat treatment process for durability
- Super finished surface treatment to reduce wear
- Supports higher RPM, more aggressive cam profiles and increased boost
Vehicle compatibility, OEM part numbers, and fitment notes are provided in the tabs above. Please confirm your vehicle's model year and engine configuration before ordering.
Not sure if this kit suits your build? Contact our team at sales@chicaneaustralia.com.au for expert advice.
Vehicle Compatibility
| Make | Model | Chassis | Engine |
|---|---|---|---|
| Subaru | WRX | GC8 | EJ20 |
| Subaru | WRX STI | GC8 | EJ20 |
| Subaru | WRX STI | GDB | EJ257 |
Technical Specifications
| Spec | Value |
|---|---|
| Spring Design | True conical valve spring |
| Retainer Material | Titanium |
| Spring Seat Material | Chromoly |
| Surface Treatment | Super finished surface treatment |
| Heat Treatment | Patented multi-step heat treatment process |
| Engine Platform | Subaru Turbo EJ (EJ20/EJ257/EJ255) |
No instructions available for this product.

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