Ferrea Valve Spring - Nissan RB25DET - Turbo Dual Valve S
Our Ferrea Valve Springs are processed with premium-grade alloy and feature special thermal treatment. Our advanced spring design and material specifications has uniform load & stress distribution even in most extreme racing environment.
- Our beehive design spring offers additional durability in all high revving street performance and mid-race applications at an affordable price.
- The dual spring technology enables you to use in high lift camshafts and extreme high RPM.
| Type/Material/Application | Dual Spring - Turbo Special Alloy INTAKE ASSEMBLY EXHAUST ASSEMBLY |
| O.D. | 20.8 mm
28.0 mm |
| I.D. | 16.51 mm
20.8 mm |
| Seat Press. | 110 lbs
@ 30.55 mm
90 lbs
@ 34.50 mm |
| Open Press. | 215 lbs
@ 20.55 mm
190 lbs
@ 24.50 mm |
| Rate Inch | 266 lbs
254 lbs |
| Coil Bind | 18 mm
21.5 mm |
| Max Net Lift | 10.5 mm
10.5 mm |
Note:
- This Spring requires Ferrea Titanium Retainer # E11082 and Ferrea Spring Seat Locator #SL 1068 (EXH Side) and Ferrea
- Spring Seat Locator #SL1069 (INT Side). (Discard OEM Spring Seat Locator) WARNING: DUE TO VALVETRAIN ASSEMBLY INSTALLED
- HIEGHTS, MAXIMUM VALVE NET LIFT MUST NOT EXCEED 10.5 MM BECAUSE OF VALVE SEAL TO SPRING RETAINER CLEARANCES.
This product was added to our catalog on Friday 06 July, 2012.