Ferrea Retainer - HO AL RET 5.5 21.60
Ferrea’s Titanium & Tool Steel Retainers are CNC machined from aerospace quality alloys and finished to exact tolerances.
- Precision CNC Machined from aerospace quality alloys.
- Finished to exact tolerances.
- Engineered for optimum strength and weight savings, which is crucial to valve-train stability at High RPM.
| Valve Stem Size | 5.5 mm |
| Diam.(A) | 21.60 mm |
| Out Step Diam.(B) | – |
| Inn Step Diam (C) | 15.35 mm |
| References | Single Spring-7 deg Pro CNC Retainer - Ferrea Racing Spring # S10029 |
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