How many valve springs do I need for my Subaru EJ engine?

Your Subaru EJ20 or EJ25 engine has multiple cylinders, and each cylinder requires a set of valve springs. Since these are sold individually, you will need to order one spring per valve. Consult your engine's service manual for the exact number of valves.

What is the benefit of dual valve springs over single springs?

Dual valve springs offer increased stability and better control over valve motion, especially at higher engine speeds. This design helps to prevent valve float more effectively than a single spring setup, contributing to more reliable engine operation under demanding conditions.

Are these springs compatible with any camshaft?

These springs are designed for performance applications and are rated for specific pressure. It's important to ensure your camshaft's specifications are compatible with the 70 lbs @ 35.5mm pressure rating to avoid potential damage to the camshaft or valves. Always refer to your camshaft manufacturer's recommendations.

Supertech EJ20/25 Dual Valve Spring SPRK-TS1015-SUB1-STI

Name: Supertech Subaru EJ20/25 70lbs/35.5mm Dual Valve Spring - Single (Drop Ship Only)
Brand: Supertech
SKU: supertech-supertech-subaru-ej20-25-70lbs-35-5mm-dual-valve-spring-single-drop-sh-t14-711789
Price: 585.42 USD
Availability: BackOrder

Supertech Subaru EJ20/25 70lbs/35.5mm Dual Valve Spring - Single (Drop Ship Only)

$585.42

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 EJ20/25 dual valve spring. 70lbs @ 35.5mm. Verified fitment. Fast shipping.

Key Features

Fits Subaru EJ20 and EJ25 engines.
Dual spring design for improved valve control.
Rated at 70 lbs of pressure at 35.5mm installed height.
Constructed from high-tensile steel for durability.
Helps prevent valve float at high RPMs.

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Product Details

These Supertech dual valve springs are built to handle the demands of high-performance Subaru EJ20 and EJ25 engines. Each spring is rated to provide 70 pounds of pressure at a installed height of 35.5mm, which is crucial for maintaining proper valve control at higher RPMs. This level of spring pressure helps prevent valve float, ensuring that your valves close reliably even when the engine is pushed hard.

Constructed from high-tensile steel, these springs are designed for durability and consistent performance. The dual spring design offers increased stability and control over single springs, making them a solid choice for builds that see significant track time or aggressive street use. Proper valve spring selection is key to unlocking the full potential of your engine's camshafts and ensuring it runs smoothly and reliably under stress. This part is sold individually, so be sure to order the correct quantity for your engine's cylinders.

When installing these, remember that they are a performance upgrade. It's important to ensure your camshafts are compatible with this spring pressure rating to avoid any potential damage. Always refer to the manufacturer's installation instructions for the most accurate guidance on fitment and setup for your specific EJ engine configuration.