What is the primary benefit of using a dual spring kit over a single spring kit?

Dual spring kits offer improved stability and dampening compared to single springs. This design helps to prevent valve float more effectively, especially at high RPMs and under significant boost pressure, contributing to more consistent valve operation.

What material are these valve springs made from?

These valve springs are constructed from high-tensile chrome silicon wire. This material is chosen for its strength and resistance to fatigue, making it suitable for the demanding conditions found in performance engines.

What is included in the Ferrea KT4013 Dual Spring Kit?

The KT4013 kit is designed to replace your stock valve springs and includes all the necessary components for a comprehensive valvetrain upgrade for your 4G63T engine.

Ferrea Mitsubishi Evo VIII 4G63T Dual Spring Kit KT4013

Name: Ferrea Mitsubishi Evo VIII 4G63T Turbo Dual Spring Kit
Brand: Ferrea
SKU: ferrea-ferrea-mitsubishi-evo-viii-4g63t-turbo-dual-spring-kit-t14-418936
Price: 1066.29 USD
Availability: BackOrder

Ferrea Mitsubishi Evo VIII 4G63T Turbo Dual Spring Kit

$1066.29

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Ferrea Mitsubishi Evo VIII 4G63T Turbo Dual Spring Kit KT4013. High-performance valve springs for your 4G63T engine.

Key Features

Fits Mitsubishi Evo VIII 4G63T Turbo.
Dual spring design for improved stability and dampening.
Constructed from high-tensile chrome silicon wire.
Designed to handle high RPMs and boost pressure.
Helps prevent valve float in performance applications.
Well-built engine components from Ferrea.

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Product Details

Constructed from high-tensile chrome silicon wire, this Ferrea Dual Spring Kit (KT4013) is built to handle the demands of a performance-oriented Mitsubishi Evo VIII 4G63T engine. These springs are designed to provide the necessary seat and open pressures to keep your valves under control at high RPMs and under boost. The dual spring design offers improved stability and dampening compared to single springs, which is crucial for preventing valve float during aggressive driving or track use. Ferrea is known for its well-built engine components, and this spring kit is no exception, offering a solid option for enthusiasts looking to rebuild or upgrade their engine’s valvetrain.

When rebuilding the top end of your Evo VIII, especially if you're increasing boost pressure or planning for higher redlines, a robust valve spring setup is essential. These springs are engineered to maintain their integrity under extreme conditions, ensuring consistent valve operation and preventing potential damage from valve float. The chrome silicon material offers a good balance of strength and fatigue resistance, which is important for longevity in a high-performance application. This kit includes everything needed to replace your stock valve springs, providing a comprehensive solution for your engine build.

For those undertaking a performance engine build on their Mitsubishi Evo VIII with the 4G63T engine, investing in a quality valve spring kit like this Ferrea KT4013 is a critical step. Proper installation is key to achieving the intended performance and reliability, so be sure to consult your service manual or a trusted mechanic for the correct procedures. This kit is a popular choice for tuners and builders looking to extract maximum performance from their 4G63T powerplant.