What is the main benefit of using dual valve springs?

Dual valve springs provide better control over valve movement, especially at high engine speeds. This setup helps prevent valve float, which is when the valve doesn't close properly due to insufficient spring pressure, and can lead to engine damage.

Do I need to buy new valve seats for this kit?

No, this Supertech valve spring kit is designed to work with your original equipment manufacturer's (OEM) seal seats. This can simplify the installation process as you won't need to source separate valve seats.

What is the spring height for this kit?

The specific spring height for this Supertech valve spring kit is 38.5mm. This measurement is important for ensuring proper fitment and function within the 4B11T cylinder head.

Supertech EVO X 4B11 Dual Valve Spring Kit SPRK-M1012-EX1

Name: Supertech Mitsubishi EVO X 4B11 Dual Valve Spring Kit (Use OEM Seal-Seat)
Brand: Supertech
SKU: supertech-supertech-mitsubishi-evo-x-4b11-dual-valve-spring-kit-use-oem-seal-sea-t14-316216
Price: 629.53 USD
Availability: BackOrder

Supertech Mitsubishi EVO X 4B11 Dual Valve Spring Kit (Use OEM Seal-Seat)

$629.53

On Backorder

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

Supertech Mitsubishi EVO X 4B11 Dual Valve Spring Kit (Use OEM Seal-Seat)

Key Features

Fits Mitsubishi EVO X 4B11T engines.
Dual spring design for improved valve control at high RPMs.
Spring height is 38.5mm.
Designed to use OEM seal seats for easier installation.
Well-built to handle the stresses of modified and high-performance engines.

This valve spring kit is specifically designed for the Mitsubishi EVO X 4B11T engine. Always confirm compatibility with your specific vehicle's engine configuration.

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Product Details

The SPRK-M1012-EX1 kit from Supertech uses a dual spring design, meaning you get two springs working together for each valve. This setup is crucial for high-performance engines like the Mitsubishi EVO X's 4B11T, where the engine can spin much faster and needs springs that can keep up without floating. These springs are designed to handle the increased demands of modified engines, ensuring your valves close reliably at higher RPMs.

Supertech has engineered these springs with specific spring rates and a height of 38.5mm to match the 4B11T's cylinder head. They are built to work with your stock OEM seal seats, simplifying installation. This dual spring configuration offers a significant improvement in valve control over single springs, reducing the risk of valve float and potential engine damage when you're pushing your EVO hard. They are well-built to withstand the stresses of repeated high-RPM operation.

This kit is intended for enthusiasts who are rebuilding or significantly modifying their 4B11T engine and need valve springs that can reliably control the valves at extreme engine speeds. It's important to note that when installing these, you'll be using your original equipment manufacturer's seal seats. This is a key component for anyone looking to maximize the performance and reliability of their EVO X's engine under demanding conditions.