Part # S10111

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.
Item# Description Qty. Price

16 Valve
Type/Material/Application: Dual Spring - Turbo - Special Alloy
Outside Diameter: 18.20 mm/24.70 mm
Inside Diameter: 13.4 mm/18.20 mm
Seat Pressure: 95 lbs @ 42.5 mm
Open Pressure: 210 lbs @ 32.5 mm
Rate Inch: 292 lbs
Coil Bind: 30 mm
Max Net Lift: 10.5 mm
This Spring requires Ferrea Titanium Retainer # E11080, Ferrea Spring Seat Locator # SL1067 and Factory supplied Spring Seat Locator.


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