Ferrea Dual Valve Spring Kit Subaru BRZ / Scion FR-S 2013-2020 | KT4022

Applications:

• 2013–2020 Subaru BRZ

• 2013–2020 Scion FR-S

Harmonics and high-frequency fatigue are present in every racing engine and can quickly destroy the valvetrain if left uncontrolled. The Ferrea Dual Valve Spring Kit is engineered to eliminate these issues by delivering exceptional stability, control, and durability under the most demanding high-RPM conditions.

Designed for Subaru BRZ and Scion FR-S, Ferrea valve springs are developed from premium-grade chrome silicon steel alloys that provide the strength and resilience needed for today’s aggressive cam profiles. Each spring is heat-treated and stress-relieved, dramatically extending service life while maintaining consistent performance across long-term use.

Paired with lightweight titanium retainers and precision seat locators, this kit provides the optimal valvetrain stability necessary for high-lift camshafts, track builds, and high-performance street applications.

Key Features:

• Eliminates Harmonics: Controls dominant frequencies that cause valvetrain instability and component failure.

• Exceptional Stability: Designed for high-lift, high-RPM racing and performance engines.

• Premium Materials: Developed from high-strength chrome silicon steel for maximum reliability.

• Extended Lifespan: Heat-treated and stress-relieved to prevent fatigue and load loss.

• Lightweight Titanium Retainers: Reduces valvetrain mass for quicker response and improved RPM potential.

• Complete Kit: Includes dual valve springs, titanium retainers, and seat locators.

What’s In The Box:

• (16) Dual Valve Springs (S10155)

• (16) Titanium Retainers (E11127)

• (16) Seat Locators (SL1140)

Benefits:

• Reduces valvetrain wear and component stress

• Improves engine durability at high RPM

• Ensures reliable valve control for performance and racing builds

• Maintains stability with minimal load loss