SKU: 1005
GSC Power-Division OEM Replacement Valve Spring Seats EJ205 EJ207 EJ257 1999-2015 Subaru Impreza WRX STI
GSC Power-Division OEM replacement valve spring seats fit Subaru EJ205 EJ207 and EJ257 turbo engines in Impreza models from 1999 to 2015 including WRX and STI variants. These seats match OEM thickness for direct drop-in installation with stock springs or GSC upgraded kits like 5043 and 5743. They deliver dependable valve train stability during high-revving performance driving.
Key Features
- OEM-Matched Thickness: Exact factory dimensions ensure proper spring preload and retainer alignment without adjustments
- Set of 16 Pieces: Complete kit covers all intake and exhaust valves on EJ turbo cylinder heads
- Stamped Steel Design: High-strength construction withstands extreme pressures and repeated valvetrain cycles
- Compatible with GSC Springs: Works seamlessly with GSC Power-Division 5043 and 5743 kits for boosted applications
- Cost-Effective OEM Alternative: Replaces pricey dealer parts while maintaining exact specifications
Product Notes
- Sold as a complete set of 16 for one full engine
- Designed for rebuilds or spring upgrades on EJ205 EJ207 EJ257 heads
- Ships in protective packaging to prevent damage
Installation Notes
- Professional installation recommended.
- Requires cylinder head removal and valve disassembly
- Uses existing OEM retainers locks and keepers
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2005 | Saab | 9-2X | Aero |
| 2009-2010 | Subaru | Impreza | 2.5 GT |
| 2006-2011 | Subaru | Impreza | 2.5i |
| 2010-2011 | Subaru | Impreza | 2.5i Premium |
| 2012-2014 | Subaru | Impreza | Base |
| 1999-2001 | Subaru | Impreza | L |
| 2012-2014 | Subaru | Impreza | Limited |
| 1999-2004 | Subaru | Impreza | Outback |
| 2009-2014 | Subaru | Impreza | WRX Premium |
| 2004-2014 | Subaru | Impreza | WRX STI |
| 2007 | Subaru | Impreza | WRX STI Limited |
| 2011-2014 | Subaru | Impreza | WRX STI Limited |
| 2010 | Subaru | Impreza | WRX STI Special Edition |
| 2006-2007 | Subaru | Impreza | WRX TR |
| 2015 | Subaru | WRX STI | Base |
| 2012-2014 | Subaru | Impreza | Premium |
| 1999-2005 | Subaru | Impreza | RS |
| 2012-2014 | Subaru | Impreza | Sport Limited |
| 2012-2014 | Subaru | Impreza | Sport Premium |
| 2002-2004 | Subaru | Impreza | TS |
| 2002-2014 | Subaru | Impreza | WRX |
| 2006-2007 | Subaru | Impreza | WRX Limited |
| 2015 | Subaru | WRX STI | Limited |
Why Choose GSC Power-Division?
- Proven in motorsport with championship-winning Subaru teams
- Engineered for turbocharged EJ engines with real-world dyno testing
- Manufactured to tight tolerances for consistent valvetrain performance
Frequently Asked Questions
-
Q: Will these fit 2004-2007 Impreza WRX STI EJ257 heads?
A: Yes, GSC1005 seats are direct OEM replacements for EJ257 turbo heads in 2004-2014 Impreza WRX STI models -
Q: What material is used for these valve spring seats?
A: Durable stamped steel matching OEM specs for strength under high boost and RPM -
Q: Can I install these with stock valve springs?
A: Yes, they work with OEM springs or GSC 5043/5743 kits. professional install advised for head work
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Secure foam-lined box for set of 16
- Weight: 1 lb
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