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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