SKU: 5073
GSC P-D Subaru EJ Single Conical Valve Spring Titanium Retainer & Spring Seat Kit
GSC Power-Division single conical valve spring kit equips Subaru EJ20 and EJ25 engines with titanium retainers and spring seats for reliable high-RPM operation. Designed for 2002-2021 WRX STI Forester XT and Legacy GT models this kit handles up to 10200 RPM while cutting valvetrain weight. Chromoly steel springs deliver consistent pressure for turbocharged performance builds.
Key Features
- Single Conical Spring Design: Minimizes harmonics and resonance for smoother valve action at extreme RPM
- Titanium Retainers: 10 grams lighter per valve than steel reduces inertia improves control with aggressive cams
- Spring Rate 85-185 lbs: Provides firm control under high boost and lift without excessive seat pressure
- Max Lift .460 inch (11.7mm): Supports oversized cams and heavy valvetrain components
- Included Spring Seats: Precision machined for perfect fit prevents movement ensures even load distribution
Product Notes
- For EJ257 dual valve applications purchase two kits one per valve
- Inspect valvetrain components during installation for compatibility
- Ships securely wrapped to prevent damage
Installation Notes
- Professional installation recommended.
- Set installed height to 1.850 inches check coil bind at 1.200 inches
- Compatible with stock or aftermarket keepers and seals
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2007 | Subaru | Impreza | WRX |
| 2004-2021 | Subaru | Impreza | WRX STI |
| 2004-2013 | Subaru | Forester | XT |
| 2008-2014 | Subaru | Legacy | 2.5 GT |
| 2008-2014 | Subaru | Outback | 2.5 GT |
| 2008-2014 | Subaru | Impreza | WRX |
Why Choose GSC Power-Division?
- Motorsport proven in drag road race and rally applications
- Engineered with dyno testing for real-world durability
- CNC machined components ensure exact tolerances every time
Frequently Asked Questions
- Q: Will this kit fit 2004-2007 STI EJ257 engines?
A: Yes fits EJ257 but requires two kits for dual valve setup one spring per intake and exhaust valve - Q: What materials are used in construction?
A: Chromoly steel springs titanium retainers and steel spring seats for strength and weight reduction - Q: What warranty coverage applies?
A: Lifetime warranty on springs against manufacturing defects when installed correctly
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock – ships same or next business day
- Packaging: Securely boxed 10x8x6 inches
- Weight: 4.6 lbs
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