SKU: 5074
GSC P-D Subaru EJ Series Dual Conical Valve Spring Kit for 2002-2021 WRX STI Forester XT Legacy GT
The GSC P-D Subaru EJ Series Dual Conical Valve Spring Kit PN 5074 delivers reliable valvetrain control for EJ20 and EJ25 engines in Subaru WRX STI Forester XT Legacy GT and similar models. Dual conical springs paired with chromoly retainers maintain precise valve action up to 10 000 RPM to stop valve float in boosted or high rev applications. Kit includes 16 springs and 16 retainers for full coverage on 4 cylinder heads.
Key Features
- Dual Conical Design: Lowers overall mass reduces harmonics and valve train noise for consistent high RPM performance
- Seat Pressure: 120 lbs at 1.720 inch installed height provides firm control without excessive wear on cams or seats
- Open Pressure: 280 lbs at 0.920 inch lift supports aggressive cam profiles and boost levels over 30 psi
- Spring Rate: 220 lbs per inch with coil bind at 1.150 inch enables 0.920 inch max lift safely
- Construction: Nitride processed high tensile steel springs with shot peening and chromoly retainers for durability in racing
Product Notes
- Verify valve stem to retainer clearance before install especially with oversized valves
- Springs designed for stock or ported cylinder heads inspect guides for wear
- Secure packaging protects components during transit
Installation Notes
- Professional installation recommended.
- Measure installed height on each spring location shim as needed for even pressures
- Requires valve spring compressor tool compatible with Subaru EJ heads
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2007 | Subaru | Impreza | WRX |
| 2004-2021 | Subaru | Impreza WRX | STI |
| 2004-2009 | Subaru | Forester | XT |
| 2005-2009 | Subaru | Legacy | GT |
| 2005-2009 | Subaru | Outback | XT |
| 1999-2001 | Subaru | Impreza | RS |
Why Choose GSC P-D?
- Motorsport proven in drag road race and rally Subaru builds
- CNC wound and tested for consistent load across all springs
- Direct replacement with exact OEM geometry for plug and play fit
Frequently Asked Questions
- Q: Will this kit fit my 2006 WRX EJ255?
A: Yes direct bolt on for all EJ255 EJ257 EJ205 heads in listed models no modifications needed - Q: What materials are used in the springs and retainers?
A: High tensile steel springs with nitride finish and shot peening chromoly steel retainers for strength and heat resistance - Q: What is the warranty and install process?
A: Lifetime warranty on springs against failure retainers 1 year professional install advised with height checks
Shipping & Handling
- Method: UPS Ground or FedEx
- Availability: In stock – ships same or next business day
- Packaging: Foam protected box 12 x 9 x 5 inches
- Weight: 4.8 lbs
Reviews
There are no reviews yet.