SKU: 5062
GSC P-D Mitsubishi 4B11T High Pressure Single Conical Valve Spring and Ti Retainer Kit 2008-2015 Lancer Evolution X
Upgrade your Mitsubishi 4B11T engine with the GSC Power-Division high pressure single conical valve spring and titanium retainer kit designed specifically for 2008-2015 Lancer Evolution X models. This kit supports extreme boost levels and high RPM operation while maintaining valve control for consistent power delivery. Engine builders rely on these components for turbocharged setups pushing beyond stock limits.
Key Features
- Single Conical Design: Reduces valve train harmonics and mass for smoother high RPM stability up to 10,000 RPM
- High Pressure Rating: 125 lbs max seat load and 90 lbs open load at 0.465" lift to handle 40+ PSI boost without coil bind
- Titanium Retainers: 10 gram lightweight construction cuts valvetrain inertia for faster revving and reduced wear
- Precise Dimensions: Installed height 1.378" block height 1.181" outer diameter 1.000" inner 0.850" with 5.9 total coils
- Complete Kit: Includes 16 springs and 16 retainers with matched tolerances for drop-in reliability on 4B11T heads
Product Notes
- Superfinished for extended fatigue life in aggressive cam and turbo applications
- Pair with GSC valve seals for optimal oil control during high lift events
- Kit weight approximately 1.8 lbs ships in protective foam-lined box
Installation Notes
- Professional installation recommended.
- Requires valve spring compressor tool for safe removal and installation on 4B11T cylinder head
- Compatible with stock keepers and GSC chromoly dual valve springs if upgrading retainers separately
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2008-2015 | Mitsubishi | Lancer Evolution | X GSR |
| 2008-2015 | Mitsubishi | Lancer Evolution | X MR |
| 2008-2015 | Mitsubishi | Lancer Evolution | X MR Final Edition |
| 2009-2015 | Mitsubishi | Lancer | Ralliart |
Why Choose GSC Power-Division?
- Proven in World Rally Championship and drag racing Evo X builds
- Dyno tested for consistent pressure retention over 100,000 cycles
- CNC machined in USA with rigorous stress testing for track durability
Frequently Asked Questions
-
Q: Will this kit fit my 2010 Evo X GSR with stock head?
A: Yes direct bolt-on for all 2008-2015 4B11T engines including GSR MR and Final Edition with no head machining required -
Q: What material are the springs made from?
A: Premium chromoly steel with shot peening and superfinishing for superior fatigue resistance under high boost -
Q: Does GSC offer a warranty on this valvetrain kit?
A: Limited lifetime warranty against spring failure when installed by certified shops and used with compatible components
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Secure GSC branded box 6x6x4 inches
- Weight: 1.8 lbs
Engine
This engine parts collection covers oil catch cans, thermostats, thermostat housings, radiator components, coolant accessories, engine covers, fuse box covers, cap covers, throttle bodies, supercharger pulleys, idler pulleys, tensioner pulleys, and engine bay dress-up parts for trucks, SUVs, muscle cars, boosted builds, high-horsepower street cars, and performance vehicles that need better reliability, cooling, airflow, oil control, and under-hood styling. The collection is particularly strong for Dodge Challenger, Charger, Durango, Jeep Grand Cherokee Trackhawk, and Ram TRX platforms running 6.2L Hellcat, 6.4L HEMI, and 5.7L HEMI engines, where oil catch can and cooling upgrades address known OEM weaknesses in the PCV and thermal management systems. Import performance platforms including GM LS-based builds, Chevrolet Camaro, and Corvette applications are also represented through Mishimoto, CSF, and ZPE GripTec product lines. Builders who invest in engine bay organization and reliab...
View Engine Products
GSC Power Division
GSC Power Division is a manufacturer of precision-engineered camshafts, valve springs, and valvetrain components designed for high-performance and competition engines across domestic, import, and diesel platforms. Founded by engineers with deep roots in motorsport, GSC Power Division components are machined to exacting tolerances and heat-treated to survive the demands of forced induction and high-rpm applications that destroy stock valvetrain parts. The brand is particularly well-known in the Mitsubishi Evo, Subaru STI, Nissan RB, and Toyota 2JZ communities where aggressive camshaft profiles are essential for extracting maximum power from turbocharged four-cylinder and six-cylinder engines. Whether building for drag racing, road course competition, or a high-powered street car, GSC Power Division camshafts and valve springs are a proven upgrade path. Popular Upgrades GSC Power Division S1, S2, and S3 camshafts are the most popular selections, with each profile offering progressivel...
View GSC Power Division Products
Valve Springs, Retainers
Welcome to our Valve Springs, Retainers collection, where precision meets performance. Our selection is meticulously curated to provide high-quality components essential for your engine's optimal functioning. Why Choose Our Valve Springs and Retainers? Superior Quality: Each product in this collection is crafted from durable materials to withstand the rigors of high-performance applications. Enhanced Performance: Our valve springs and retainers are designed to improve engine efficiency and reliability. Precision Engineering: Engineered for exact fitment and performance, ensuring your engine runs smoothly and reliably. Wide Selection: We offer a variety of options to suit different engine models and performance needs. Key Features of Our Valve Springs and Retainers Explore the standout features of our valve springs and retainers: High Tension Ratings: Ideal for high-revving engines to maintain valve control. Lightweight Design: Contributes to reduced overall engine weight ...
View Valve Springs, Retainers Products
Valves & Components
Browse all of our valves and valvetrain components at Black Ops Auto Works, including engine valves, valve covers, valve cover gaskets, valve guides, valve springs, retainers, valve locks, valve seals, lash caps, and related valvetrain hardware for performance builds, engine refreshes, and high-horsepower applications. Whether you are rebuilding a cylinder head, upgrading your valvetrain for higher RPM, or replacing worn valve train components, this collection is built for customers searching for engine valves, valve springs and retainers, valve cover gaskets, performance valve covers, and valvetrain upgrades. Shop Top Valvetrain Brands Find trusted brands in the valve and valvetrain category, including: GSC Power Division Supertech Brian Crower Ferrea Manley Performance Cometic Granatelli Moroso BLOX Racing These brands are known for performance intake valves, exhaust valves, valve spring kits, titanium retainers, valve guides, valve locks, valve seals, billet valve covers, an...
View Valves & Components Products


