SKU: 5042 | UPC: GSC5042
GSC Power-Division Mitsubishi 4B11T Beehive Valve Springs & Ti Retainer Kit (2008-2015 Evo X, Ralliart. Use w/OE Spring Seats)
GSC Power-Division Beehive Valve Springs and Titanium Retainer Kit delivers precise valvetrain control for Mitsubishi 4B11T engines in 2008-2015 Lancer Evolution X, 2009-2015 Lancer Ralliart, and 2010-2011 Lancer Ralliart Sportback models. Lighter beehive design cuts mass versus stock dual springs while maintaining 120lb seat pressure for rock-solid stability at 9000+ RPM. Pair with titanium retainers to drop inertia and support turbo builds up to 35psi boost.
Key Features
- Beehive Progressive Design: Tapered shape reduces weight by 14g per spring over duals, fights harmonics for fatigue-free operation.
- Seat Pressure: 120lbs at 1.720in ensures positive valve closure under extreme boost and high miles.
- Open Pressure: 280lbs at 0.440in lift handles stock cams or upgrades without float.
- Titanium Retainers: 7075 billet Ti saves 18g per valve versus steel, accelerates response.
- Coil Bind Height: 1.150in with max lift 0.440in clears most aftermarket cams safely.
Product Notes
- Requires OEM spring seats and locators for installation.
- Kit contains 16 chromoly steel beehive springs and 16 titanium retainers for full 4B11T head.
- Ships ready for immediate valvetrain upgrade, no core return needed.
Installation Notes
- Professional installation recommended.
- Reuse stock spring seats, retainers drop directly onto OEM valves.
- Compatible with factory valve locks and keepers, no custom hardware required.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2008-2015 | Mitsubishi | Lancer | Evolution |
| 2009-2015 | Mitsubishi | Lancer | Ralliart |
| 2010-2011 | Mitsubishi | Lancer | Ralliart Sportback |
Why Choose GSC Power-Division?
- Backed by 20+ years designing valvetrain for drag, time attack, and rally teams.
- Every spring load-tested to +/-2lb tolerance for matchless consistency.
- Dyno-proven in 1000hp+ 4B11T builds with zero failures reported.
Frequently Asked Questions
- Q: Does this fit 2008-2015 Mitsubishi Lancer Evolution X?
A: Yes, direct fit for all 4B11T-equipped Evo X models including MR and GSR when using OE spring seats. - Q: What materials are used in construction?
A: Beehive springs from premium chromoly steel with dual angle machining. Retainers from lightweight 7075 aerospace titanium. - Q: What warranty coverage applies?
A: Lifetime warranty on valve springs for manufacturing defects with proper installation. Retainers covered 1 year.
Shipping & Handling
- Method: UPS Ground
- Availability: In stock – ships same or next business day
- Packaging: Foam-secured box 10 x 10 x 6 inches
- Weight: 5 lbs
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