Ferrea KT4020 Subaru WRX STI Endurance Dual Spring Kit

The Ferrea KT4020 Endurance Dual Spring Kit is engineered to meet the rigorous demands of high-performance Subaru WRX STI engines. Designed for endurance racing and high-revving applications, this dual spring kit ensures optimal valve control and reliability under extreme conditions. The kit includes premium quality dual springs, retainers, and locators, all crafted from high-strength materials to withstand the stress of high RPM operation. Experience improved engine performance, enhanced durability, and peace of mind with Ferrea's precision-engineered components.

Each component in the Ferrea KT4020 kit is meticulously crafted to provide superior performance and longevity. The dual springs are designed to offer the perfect balance of stiffness and flexibility, ensuring that your engine can handle the increased demands of racing and spirited driving. Whether you're on the track or the street, this spring kit delivers the performance edge you need.

Installation of the Ferrea KT4020 kit is straightforward, with components designed to fit seamlessly into your Subaru WRX STI's existing setup. The kit's retainers and locators are precision-machined to ensure a perfect fit, reducing the risk of failure and maximizing the lifespan of your engine's valvetrain. Trust Ferrea for unmatched quality and performance in every component.

The Ferrea KT4020 Subaru WRX STI Endurance Dual Spring Kit is compatible with the following models:

• 2004-2021 Subaru WRX STI
• 2002-2014 Subaru WRX (with EJ20/EJ25 engines)
• 2004-2013 Subaru Forester XT (with EJ25 engine)
• 2005-2009 Subaru Legacy GT (with EJ25 engine)
• 2005-2009 Subaru Outback XT (with EJ25 engine)

This fitment information ensures that the Ferrea KT4020 kit is perfectly suited for a range of Subaru models, providing enhanced performance and durability for your vehicle's engine.