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GSC Power-Division Subaru EJ Valve Spring Seats, OEM Replacement
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GSC P-D Valve Seat Set OEM Replacement EJ205/EJ207/EJ257

GSC1005
GSC1005
Valve Springs, Retainers
20+ Units In Stock - Ships Next Business Day
$ 26.40 $ 22.44
$ 22.44

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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