Actual part may differ from image above.


This Kit contains 16 Ferrea Single Intake & Exhaust Valve Springs

These springs are a 30% increase in spring pressure compared to the OEM valve springs.
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.



- Outer Spring OD 22.38mm
- Outer Spring ID 15.52mm
- Open Pressure 180lbs @ 27.00mm
- Max Lift 11.00mm
- Coil Bind 24.60mm
- Manufacturer Ferrea
- Valve Spring Type Single
- Seat Pressure 80lbs @ 37.00mm
- Valve Spring Rate 254lbs/inch


This Spring requires Ferrea Titanium Retainer (INTAKE) # E11139 and (EXHAUST) # E11140 and Ferrea Spring Seat Locator # SL1142. (Discard OEM Spring Seat Locator) NOTE: Max Net Lift is limited by the OEM factory valve seal installed height.



Replaces OEM Part #'s


06E-109-623-H / 06E109623 H / 06E 109 623 H / 06E109623H

06E-109-623-AD / 06E109623 AD / 06E 109 623 AD / 06E109623AD