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GSC Power-Division OEM Replacement Valve Spring Seat Set for 4G63T
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GSC P-D 4G63T Valve Seat OEM Replacement (Set of 16)

GSC1004
GSC1004
Valve Springs, Retainers
14 Units In Stock - Ships Next Business Day
$ 26.40 $ 22.44
$ 22.44

SKU: 1004

GSC Power-Division OEM Replacement Valve Spring Seat Set for 4G63T (1990-2006 DSM & Evo)

GSC Power-Division OEM replacement valve spring seats deliver precise fit for 4G63T engines in DSM models like Eclipse GST GSX Talon TSi and Evo 8/9. This set of 16 replaces worn factory seats during upgrades to high-performance springs such as GSC Beehives without altering spring pressure. Maintain reliability at high RPM with direct OEM-spec thickness and design.

Key Features

  • OEM Dimensions: Matches factory thickness to preserve exact spring pressure and prevent bind during valvetrain upgrades
  • Set of 16: Complete kit covers all valves on 4G63T cylinder heads for full refresh
  • High-Strength Steel: Built to handle increased spring loads from performance kits while resisting wear
  • Direct Replacement: Drops in place of stock seats for seamless integration in stock or modified engines
  • Performance Ready: Ideal base for GSC Beehive or Super Beehive springs in racing or street applications

Product Notes

  • Sold as a complete set of 16 for one cylinder head
  • Inspect seats during spring upgrades to ensure proper spring bind clearance
  • Package weight 0.8 lbs ships in 6x4x2 inch box

Installation Notes

  • Professional installation recommended.
  • Remove cylinder head and press out old seats using proper tooling
  • Compatible with stock retainers and locks no additional hardware needed

This Part Fits

Year Make Model Submodel
1990-1998 Eagle Talon TSi
1990-1994 Mitsubishi Eclipse GS
1990-1999 Mitsubishi Eclipse GST
1990-1999 Mitsubishi Eclipse GSX
1996-1999 Mitsubishi Eclipse Spyder GST
1991-1992 Mitsubishi Galant VR-4
2005-2006 Mitsubishi Lancer Evolution
2005-2006 Mitsubishi Lancer Evolution RS
2006 Mitsubishi Lancer Evolution SE
1990-1994 Plymouth Laser RS

Why Choose GSC Power-Division?

  • Proven in DSM and Evo racing with thousands of race wins
  • Engineered for durability under extreme boost and RPM
  • Precision machined in the USA for consistent valvetrain stability

Frequently Asked Questions

  • Q: Does this fit 2005-2006 Evo 8/9 with 4G63T?
    A: Yes fits all 4G63T heads including Evo 8 MR and 9 MR models directly as OEM replacement
  • Q: What material are these seats made from?
    A: High-strength steel construction matches OEM specs for heat resistance and load handling
  • Q: Do I need to change spring pressure settings?
    A: No same thickness as OEM ensures stock pressure with any compatible performance spring

Shipping & Handling

  • Method: UPS Ground or USPS Priority
  • Availability: In stock - ships same or next business day
  • Packaging: Compact box 6 x 4 x 2 inches
  • Weight: 0.8 lbs

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