SKU: 5097
GSC P-D Mitsubishi 4G63T Extreme Pressure Conical Valve Spring and Ti Retainer Kit 90-99 DSM Evo 1-3
Equip your Mitsubishi 4G63T engine with the GSC Power-Division 5097 kit featuring 16 conical valve springs and 16 titanium retainers for 1990-1999 DSM Eclipse Talon Laser and Evo 1-3. This setup delivers 115 lbs seat pressure at 1.780 inches and 280 lbs open pressure at 1.200 inches to maintain valve control during high boost over 40 psi and RPM beyond 9000. Conical design cuts valvetrain weight and harmonics for consistent power in drag racing and street builds.
Key Features
- Extreme Pressures: 115 lbs seat at 1.780 inches 280 lbs open at 1.200 inches with 380 lbs/in rate handles aggressive cams and boost.
- Conical Geometry: Progressive rate design lowers overall mass versus dual springs improves high RPM stability and reduces resonance.
- Titanium Retainers: 14 gram lightweight retainers PN 7010-16 minimize inertia for quicker valve action.
- Super Clean Coating: Friction reducing finish on chrome silicon steel prevents wear and galling for long service life.
- Full Kit Specs: Max lift 0.390 inches coil bind 1.150 inches 16 springs 16 retainers with OEM compatible locks.
Product Notes
- Inspect cylinder head for wear before install to ensure proper spring heights.
- Springs carry lifetime warranty for stock RPM applications.
- Kit weighs 2.1 lbs ships in 10 x 6 x 4 inch box.
Installation Notes
- Professional installation recommended.
- Measure installed height set to 1.780 inches seat pressure adjust with shims.
- Works with OEM seats locks lash caps advised for cams over 0.350 lift.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1990-1994 | Mitsubishi | Eclipse | GST GSX |
| 1995-1999 | Mitsubishi | Eclipse | GST GSX |
| 1990-1994 | Eagle | Talon | TSi |
| 1995-1999 | Eagle | Talon | TSi |
| 1990-1994 | Plymouth | Laser | RS Turbo |
| 1992 | Mitsubishi | Lancer Evolution | I JDM |
| 1993-1994 | Mitsubishi | Lancer Evolution | II JDM |
| 1995-1996 | Mitsubishi | Lancer Evolution | III JDM |
Why Choose GSC Power-Division?
- Track record in 2000hp 4G63 engines from drag and rally teams.
- USA manufactured with aerospace grade materials and processes.
- Extensive dyno testing validates pressures and durability.
Frequently Asked Questions
-
Q: Does this fit 6-bolt and 7-bolt 4G63T heads?
A: Yes fits all DSM 1G 2G and Evo 1-3 4G63T heads no modifications needed. -
Q: What spring material and coating?
A: Chrome silicon steel wire with Super Clean proprietary coating for corrosion resistance and low friction. -
Q: What warranty coverage?
A: Lifetime warranty on springs for factory RPM limits excludes failures from improper install or over-revving.
Shipping & Handling
- Method: UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: Secure box 10 x 6 x 4 inches
- Weight: 2.1 lbs
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