• Ferrea 'Drag' Dual Valve Spring Kit | 2004-2020 Subaru STi | KT4019

Ferrea Racing

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Ferrea 'Drag' Dual Valve Spring Kit | 2004-2020 Subaru STi

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Pay over time available · Est. $33.25/payment
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Ferrea Racing Ferrea 'Drag' Dual Valve Spring Kit | 2004-2020 Subaru STi
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Fitment

  • 2004–2017 Subaru | WRX STI

Description

Valve Spring Kit for 2004-2020 Subaru STI by Ferrea

Harmonics or high frequency fatigue is present in all racing engines and will usually destroy the valvetrain if not controlled. Properly designed valve springs will control the dominant harmonics, provide the needed stability, and reduce valvetrain component wear. Ferrea valve springs are developed from high strength alloys, including premium grade chrome silicon steel.

Our springs are heat-treated and stress relieved, which dramatically increases the spring’s life. Our valve springs provide the stability needed for high lift, high rpm racing engines, while minimizing the load loss for today’s aggressive valvetrain combinations.

Features

  • Controls Dominant Harmonics
  • Provides Needed Stability
  • Reduce Valvetrain Component Wear
  • Developed from High Strength Alloys
  • Heat-Treated and Stress Relieved

Applications

  • 2004 - 2014 Subaru Impreza WRX STi
  • 2015 - 2020 Subaru WRX STI

What's In The Box?

  • 16 - Dual Springs (S10097)
  • 16 - Titanium Retainers (E11064)
  • 16 - Seat Locators (SL1051)
  • 16 - Valve Locks (K10074)

Warranty

  • Ferrea Manufacturer's Warranty

Shipping and Delivery

Review our Shipping Policy for delivery details, shipping costs and exclusions.

Warranty and Support

For Ferrea Racing warranty information, contact our support team.

Return and Refund

Eligibility, exclusions, applicable fees and exceptions are detailed in our Return Policy. Restrictions apply to special-order and custom products.

Proposition 65

Proposition 65 Warnings: cancer and reproductive harm www.p65warnings.ca.gov