GSC Beehive Valve Spring Kit w/ Titanium Retainers – Mitsubishi 4G63 (GSC5040)
Complete Valvetrain Upgrade for 4G63 Engines
The GSC Power Division beehive valve spring kit with titanium retainers is designed for all Mitsubishi 4G63 platforms, including Evo 1–9. This set includes 16 beehive springs and 16 lightweight titanium retainers, offering a direct-fit solution for replacing factory components while unlocking higher RPM potential and improved valve control.
Spring Pressure & Lift Specs
- Intake Seat Pressure: 84 lbs @ 1.590"
- Exhaust Seat Pressure: 90 lbs @ 1.570"
- Intake Open Pressure: 227 lbs @ 1.149"
- Exhaust Open Pressure: 233 lbs @ 1.129"
- Maximum Valve Lift: 0.506"
- Coil Bind: 1.004"
Performance Limits
- Max RPM: 8,500
- Max Boost: 30 psi
Product Details
- Part Number: GSC5040
- Fitment: All Mitsubishi 4G63 engines (Evo 1–9, DSM)
- Includes: 16 beehive valve springs + 16 titanium retainers
- Compatibility: Ideal for replacing OEM retainers
Why Beehive?
GSC’s beehive spring design uses ovate wire and advanced heat treatment to minimize load loss and extend fatigue life. The smaller, lighter titanium retainer allows for higher RPM operation and tighter valve control—perfect for aggressive builds pushing boost and rev limits.
Fitment:
- 1995 - 1999 Mitsubishi Eclipse GS-T/GSX 2.0L Turbo (4G63T)
- 1990 - 1994 Mitsubishi Eclipse 2.0L Turbo (4G63T)
- 1991 - 1992 Mitsubishi Galant VR-4 2.0L Turbo (4G63T)
- 1992 - 1996 Mitsubishi Lancer Evolution I–III 2.0L Turbo (4G63T)
- 1996 - 2003 Mitsubishi Lancer Evolution IV–VII 2.0L Turbo (4G63T)
- 2003 - 2007 Mitsubishi Lancer Evolution VIII–IX 2.0L Turbo (4G63T)
- 1990 - 1998 Eagle Talon TSi 2.0L Turbo (4G63T)
- 1990 - 1994 Plymouth Laser RS Turbo 2.0L Turbo (4G63T)
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