What is the primary benefit of using dual valve springs?

Dual valve springs offer improved stability and control over valve motion, especially at higher engine speeds. This setup helps prevent valve float and ensures reliable valve closure under increased stress and RPMs.

What other components are typically needed when installing this valve spring kit?

When installing performance valve springs, it's common to also need compatible performance camshafts and valve retainers. Always refer to the manufacturer's installation guide for a complete list of recommended or required components.

Are these springs suitable for stock EZ30 engines, or are they only for modified applications?

While these springs are built to handle the demands of performance camshafts and higher RPMs, they can also be used in a stock engine rebuild for added durability and peace of mind. However, their true benefit is realized when paired with modifications that increase valve lift or duration.

Supertech EZ30 Dual Valve Spring Kit SPRK-TS1015-SU6

Name: Supertech Subaru EZ30 (1st Gen) Dual Valve Spring Kit
Brand: Supertech
SKU: supertech-supertech-subaru-ez30-1st-gen-dual-valve-spring-kit-t14-316271
Price: 878.09 USD
Availability: BackOrder

Supertech Subaru EZ30 (1st Gen) Dual Valve Spring Kit

$878.09

On Backorder

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

Supertech Subaru EZ30 (1st Gen) Dual Valve Spring Kit

Key Features

Fits Subaru EZ30 (1st Gen) engines.
Dual spring design for improved valve stability at high RPM.
Constructed from materials chosen for heat and fatigue resistance.
Designed to handle increased lift and duration from performance camshafts.
Essential for engine rebuilds and performance modifications.
Includes inner and outer springs for each valve.

This valve spring kit is designed for Subaru EZ30 (1st Gen) engines. Please verify fitment for your specific vehicle application.

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Product Details

This is the Supertech dual valve spring kit specifically for the Subaru EZ30 engine, covering the first generation of this flat-six powerplant. If you're rebuilding the top end of your EZ30, whether for performance or to refresh worn components, a new set of valve springs is a critical part of the job. These springs are designed to handle increased lift and duration from performance camshafts, ensuring your valves close reliably at higher RPMs and under more stress than stock springs can manage. They are a well-built component that forms the foundation for a healthy, high-revving engine.

Supertech has engineered these springs with specific attention to the demands of modified EZ30 engines. The kit includes dual springs, which means you get an inner and outer spring for each valve. This setup offers better stability and control over valve motion, especially at high engine speeds, reducing the risk of valve float. The materials used are chosen for their resilience to heat and fatigue, common issues in performance applications. This dual spring design is a popular choice for tuners and builders looking to extract more power and reliability from their Subaru's boxer engine. When installing, pay close attention to the manufacturer's recommended spring seat pressures and installed heights to ensure optimal performance and longevity.

This kit is a significant upgrade for anyone serious about their EZ30 engine build. It's designed to work with performance camshafts and retainers, so consider those components as you plan your rebuild. Ensure you have the correct tools for valve spring compression and installation, as working on the cylinder heads requires precision. With the right installation, these springs will help your engine perform reliably at its peak.