What is the main benefit of using dual valve springs?

Dual valve springs offer improved stability and control over the valves, especially at high engine speeds. This design helps to prevent valve float, ensuring that the valves close properly and remain seated against the camshaft, which is crucial for consistent engine performance and reliability.

Are these springs suitable for stock engines, or are they for modified builds?

While these springs are well-built, they are typically recommended for modified Subaru STI engines. They are designed to handle the increased demands of higher RPMs, more aggressive camshafts, and other performance upgrades that might exceed the capabilities of the stock valve springs.

What other components are usually replaced when installing performance valve springs?

When upgrading valve springs, it's common practice to also replace or upgrade related valvetrain components. This often includes valve retainers, valve seals, and sometimes performance camshafts to fully optimize the valvetrain for the intended performance goals.

Ferrea Subaru STI Dual Valve Spring Set S10098

Name: Ferrea Subaru STI Dual Valve Spring - Set of 16
Brand: Ferrea
SKU: ferrea-ferrea-subaru-sti-dual-valve-spring-set-of-16-t14-419111
Price: 552.14 USD
Availability: BackOrder

Ferrea Subaru STI Dual Valve Spring - Set of 16

$552.14

On Backorder

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

Ferrea Subaru STI Dual Valve Spring - Set of 16

Key Features

Fits 2004-2014 Subaru STI.
Set includes 16 dual valve springs.
Constructed from high-strength materials for durability.
Designed to prevent valve float at higher RPMs.
Ensures reliable valvetrain operation under demanding conditions.

This valve spring set is designed for Subaru STI models from 2004 through 2014. Please verify fitment for your specific vehicle application.

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Product Details

This is a set of 16 dual valve springs from Ferrea, specifically designed for the Subaru STI models from 2004 through 2014. Valve springs are critical components in your engine's valvetrain, responsible for closing the valves quickly and keeping them seated against the camshaft. When you're pushing your STI's engine hard, especially with modifications, the stock valve springs might not be up to the task of controlling the valves at higher RPMs or with more aggressive camshaft profiles. This set from Ferrea is built to handle those demands, ensuring reliable valvetrain operation under stress.

Ferrea is known for making well-built valvetrain components, and these dual springs are no exception. They are constructed from high-strength materials designed to withstand the intense pressures and heat generated within the engine. The dual spring design offers improved stability and control over the valves, reducing the risk of valve float at high engine speeds. This means your engine can safely rev higher and maintain consistent power delivery when you need it most. Installing these springs is typically part of a larger engine build or rebuild, often paired with performance camshafts and retainers to optimize the entire valvetrain system for increased performance and durability.

This set includes 16 individual valve springs, enough to cover all the valves in your Subaru STI's engine. When undertaking a project that requires upgraded valve springs, it's always a good idea to consult the manufacturer's installation instructions to ensure proper fitment and assembly. This ensures you get the most out of these performance-oriented components and maintain the integrity of your engine build.