Ferrea Dual Valve Spring | 2003-2008 Nissan 350Z (S10103)

Ferrea Racing
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$28.32 $31.47Instant Savings of 10% ($3.15)

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2003-2008 Nissan 350Z Dual Valve Springs 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. These springs are manufactured with state-of-the-art equipment. Our springs are heat-treated and stress relieved, which dramatically increases the spring’s life. Strict quality control procedures and cycle testing ensures consistency from batch to batch. Ferrea Valve Springs provide the stability needed for high lift, high rpm racing engines, while minimizing the load loss for today€™s aggressive valvetrain combinations.

Please Note: This Spring to be used with Ferrea lightweight Valves without recess tip. This spring requires Ferrea Titanium Retainer #E11079 AND Ferrea Spring Seat Locator #SL1065. (Discard OEM Spring Seat Locator).


  • Outside Diameter: 20.8 mm/28.0 mm
  • Inside Diameter: 15.88 mm/20.8 mm
  • Seat Pressure: 80 lbs @ 34 mm
  • Open Pressure: 200 lbs @ 24 mm
  • Rate Inch: 305 lbs
  • Coil Bind: 19 mm
  • Max Net Lift: 13 mm


  • Reduce valvetrain component wear
  • Provide the stability needed for high lift, high rpm racing engines
  • Helps minimize the load loss for today€™s aggressive valvetrain combinations


  • 2003-2008 Nissan 350Z

What's In The Box?

  • 1 - Valve Spring


  • No Warranty

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