SKU: 5040 | UPC: GSC5040
GSC P-D Mitsubishi Evolution 1-9 4G63 Beehive Valve Springs & Ti Retainer Kit
This GSC Power-Division kit includes beehive valve springs and titanium retainers for the 4G63 DOHC engine in Mitsubishi Evolution 1-9 Lancer Evo DSM Eclipse Talon Galant and Plymouth Laser models. It prevents valve float at higher engine speeds for consistent boost performance. The reduced valvetrain mass enables reliable high-RPM operation up to 10,000 RPM in performance builds.
Key Features
- Beehive Spring Design: Progressive dual coils reduce valvetrain weight by 30% compared to stock for faster valve action and higher rev limits
- Titanium Retainers: 10 gram retainers per valve offer greater strength than steel to resist fatigue in turbocharged 4G63 setups
- Precise Spring Rates: Intake seat 85 lbs at 1.780 inches open 225 lbs at 1.170 inches exhaust seat 95 lbs open 240 lbs coil bind at 1.100 inches works with big cams
- Complete Kit Contents: 16 beehive springs 16 Ti retainers and 32 matching valve locks direct fit for stock or aftermarket valves
- High RPM Durability: Tested to 10,000 RPM holds control in 500+ whp 4G63 builds for drag racing and time attack
Product Notes
- Inspect retainer to guide clearance during install to ensure proper seating
- Recommended for use with stock valve seals or upgraded 10-degree seals
- Ships in protective foam-lined box dimensions 10 x 8 x 4 inches product weight 4.2 lbs shipping weight 5 lbs
Installation Notes
- Professional installation recommended.
- Use quality spring compressor tool check installed height after assembly
- Compatible with OEM or aftermarket cams verify stem clearance with beehive profile
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1992-2006 | Mitsubishi | Lancer | Evolution 1-9 |
| 2005-2006 | Mitsubishi | Lancer Evolution | MR |
| 2005-2006 | Mitsubishi | Lancer Evolution | RS |
| 2006 | Mitsubishi | Lancer Evolution | SE |
| 1990-1998 | Eagle | Talon | TSi |
| 1990-1999 | Mitsubishi | Eclipse | GST |
| 1990-1999 | Mitsubishi | Eclipse | GSX |
| 1990-1994 | Mitsubishi | Eclipse | GS |
| 1996-1999 | Mitsubishi | Eclipse Spyder | GST |
| 1991-1992 | Mitsubishi | Galant | VR-4 |
| 1990-1994 | Plymouth | Laser | RS |
Why Choose GSC Power-Division?
- Proven in NHRA drag racing and SCCA rallycross with multiple championship teams
- CNC machined from premium 51CrV4 wire and aerospace-grade titanium
- Dyno and flow bench validated for exact 4G63 valvetrain dynamics
Frequently Asked Questions
- Q: Will this kit fit all Evolution 1-9 4G63 engines including JDM models?
A: Yes direct bolt-on for all DOHC 16-valve 4G63 heads in Evo 1-9 USDM JDM including Evo 8/9 with stock or ported heads - Q: What materials are used in the springs and retainers?
A: Beehive springs from heat-treated 51CrV4 steel retainers from 6AL4V titanium locks from high-strength steel all shot-peened for longevity - Q: What is the warranty and install process?
A: Lifetime warranty on springs 1-year on retainers requires professional install with spring height check for optimal pressures
Shipping & Handling
- Method: UPS Ground or FedEx Home Delivery
- Availability: In stock – ships same or next business day
- Packaging: Foam-lined cardboard box 10 x 8 x 4 inches
- Weight: 4.2 lbs
