Ferrea is pleased to offer our Pro-Series Titanium Retainers including sizes that fit both traditional Domestic springs and Sport Compact springs. Precision CNC-machined from aerospace quality titanium, these Pro Retainers are fully heat-treated and finished to exact tolerances, adding strength while offering a 40% weight reduction over conventional steel retainers. Examine the overall quality of Ferrea’s Pro-Series Retainers and see why professional engine builders demand Ferrea Racing Components.


- Valve Stem Size: 7 mm
- Diameter (A): 28 mm
- Inn Step Diameter (C): 17.17 mm


References: Double Spring-7 Degree Pro CNC- Ferrea Racing Springs #S10062. Ferrea Valve Lock #K10099

Replaces OEM Part #  021-109-641-C / 021109641 C / 021 109 641 C / 021109641C