SKU: 5098
GSC P-D Mitsubishi 4G63T High Pressure Conical Valve Spring and Ti Retainer Kit 1990-1999 Eclipse Talon Laser
This GSC Power-Division kit delivers high pressure conical valve springs and titanium retainers engineered for Mitsubishi 4G63T DOHC 16-valve turbo engines in 1990-1999 DSM vehicles including Eclipse GST GSX Talon TSi and Laser RS. The design handles high boost and lift up to 1.200 inches while reducing valve train mass for reliable high RPM operation. Drivers gain precise valve control and durability in demanding turbo builds.
Key Features
- Conical Spring Design: Progressive coils minimize harmonics and surge for smoother operation at 9000+ RPM
- High Pressure Specs: 160 lbs seat pressure 440 lbs open at 1.200 inches lift 210 lbs/in rate coil bind at 1.000 inches
- Titanium Retainers: Lightweight 7075 alloy reduces valvetrain inertia improves stability and accelerates response
- Premium Materials: Super clean chromoly steel springs resist fatigue in high boost applications
- Complete 16-Valve Kit: Includes 16 springs 16 retainers 16 valve locks for full top-end upgrade
Product Notes
- Designed as direct replacement for stock springs in 4G63T engines no valvetrain geometry changes required
- Inspect retainers for proper seat prior to install to ensure peak performance
- Packaged in protective foam insert to prevent shipping damage
Installation Notes
- Professional installation recommended.
- Set install height to 1.820 inches for correct pressures verify with dial indicator
- Compatible with stock or aftermarket chromoly valves and keepers
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1990-1994 | Mitsubishi | Eclipse | GST |
| 1990-1994 | Mitsubishi | Eclipse | GSX |
| 1995-1999 | Mitsubishi | Eclipse | GST |
| 1995-1999 | Mitsubishi | Eclipse | GSX |
| 1990-1994 | Eagle | Talon | TSi FWD |
| 1990-1994 | Eagle | Talon | TSi AWD |
| 1995-1999 | Eagle | Talon | TSi FWD |
| 1995-1999 | Eagle | Talon | TSi AWD |
| 1990-1994 | Plymouth | Laser | RS |
Why Choose GSC Power-Division?
- Race components trusted in DSM drag and time attack builds worldwide
- Manufactured to exact tolerances for consistent pressures and longevity
- Engineered with real-world dyno testing for turbocharged 4G63T reliability
Frequently Asked Questions
- Q: Does this kit fit 1990-1999 DSM 4G63T engines only?
A: Yes fits all DOHC 16-valve turbo 4G63T in Eclipse Talon Laser no Evo compatibility - Q: What materials are used in the springs and retainers?
A: Springs from super clean chromoly steel retainers from 7075 aircraft titanium both heat treated for strength - Q: What is the warranty on this valve spring kit?
A: GSC offers No Break Guarantee on valve springs when installed and maintained correctly
Shipping & Handling
- Method: UPS Ground
- Availability: In stock – ships same or next business day
- Packaging: Sturdy cardboard box with foam protection 10 x 8 x 6 inches
- Weight: 4.60 lbs
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