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Part Brand: Ferrea

Part Number: KT4014

Vehicle Fitment

2008–2015 Mitsubishi Lancer Evolution X (4B11T)

Features

Dual valve spring configuration for enhanced high-RPM stability
Constructed from premium-grade chrome silicon steel for durability
Heat-treated and stress-relieved to withstand extreme racing conditions
Designed to reduce valvetrain harmonics and minimize load loss
Compatible with Ferrea titanium retainers (e.g., E11089) and valve locks (e.g., K10091)
Ideal for naturally aspirated and forced induction applications up to 9,000 RPM
Developed to control harmonics and reduce valvetrain component wear
Sold as a complete kit for 16 valves

Specifications

Material: Chrome silicon steel
Design: Dual spring configuration
Quantity: 16 springs, 16 titanium retainers, 16 seat locators, 16 valve locks
Compatibility: Ferrea titanium retainers (e.g., E11089), valve locks (e.g., K10091)
Recommended Seat Pressure: Approximately 105 lbs
Maximum Lift: Approximately 0.600" (15.24 mm)
Maximum RPM: Approximately 9,000

Included Components

16x Dual Valve Springs #S10018
16x Titanium Retainers #E11089
16x Seat Locators #SL1096
16x Valve Locks #K10091

Product Description

The Ferrea KT4014 Dual Valve Spring Kit is engineered for high-performance applications in 2008–2015 Mitsubishi Lancer Evolution X models equipped with the 4B11T engine. This comprehensive kit includes 16 dual valve springs (#S10018), 16 titanium retainers (#E11089), 16 seat locators (#SL1096), and 16 valve locks (#K10091), providing all necessary components for a complete valvetrain upgrade.

Constructed from premium-grade chrome silicon steel, these valve springs are heat-treated and stress-relieved to withstand extreme racing conditions. The dual spring configuration effectively reduces valvetrain harmonics and minimizes load loss, making it ideal for naturally aspirated and forced induction applications up to 9,000 RPM.

Designed to control harmonics and reduce valvetrain component wear, the KT4014 kit ensures enhanced durability and performance. Compatible with Ferrea titanium retainers and valve locks, this kit offers a reliable solution for enthusiasts seeking to maximize their engine's potential.

*Parts are for USA spec vehicles, please contact us to verify fitment on JDM & international models.

· · · SHIPPING · · ·

Free shipping across the contiguous 48 United States (excludes Hawaii and Alaska). Item(s) ships on the same day or within 1 business day. Delivery time is within 2 to 4 business days excluding next day deliveries. Orders over $750 require signature for delivery.
Canada customers - If eBay does not collect import & duty fees during checkout, the shipping carrier will collect them prior to delivery.

· · · RETURNS · · ·

Your complete shopping satisfaction is our #1 priority. If an item you ordered from us does not meet your expectations, please contact us within 30 days of receiving the item(s). If your order arrives damaged from shipping please contact us and we will provide a prepaid return label to send back for a replacement or refund.
Returned items must be in the original packaging (including plastic wrapped items) and in brand new condition.
Any returns received installed, mounted, used or missing components will be subject to return fee's.

· · · PAYMENTS · · ·

We accept all payment methods through eBay's payment system
PayPal, and all major credit cards/debit cards are accepted.

· · · FEEDBACK · · ·

Customer satisfaction is a top priority for us. If you have any issues with your order, please let us know. We will make every effort to resolve any problems and ensure you are satisfied.

· · · CONTACT US · · ·

We appreciate your business. If you have any questions, please message us through eBay and we will respond within 24 hours on weekdays. Feel free to browse our eBay store for other available items. Thank you again for choosing to shop with us!