Ferrea Racing

Ferrea Single Valve Spring Kit | 2009-2013 Audi A4/A5 2.0L FSI (KT4007)

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Phone 1-888-627-3736

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$772.09 $1,072.40Instant Savings of 28% ($300.31)

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Valve Spring Kit for 2009-2013 Audi A4/A5 (2.0L FSI) 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.


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


  • 2009 - 2013 Audi A4 2.0L FSI
  • 2009 - 2013 Audi A5 2.0L FSI

What's In The Box?

  • 16 - Single Springs (S10157)
  • 8 - Titanium Retainers (E11139)
  • 8 - Titanium Retainers (E11140)
  • 16 - Seat Locators (SL1142)



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