Cosworth High RPM Valve Springs

Part #: COS1 20004844


Head Alteration Required: No
Inner Valve Spring: Yes
Location: Intake and Exhaust
Machining Required: No
Retainers: Not Included
Mfgr. Warranty: No Warranty

At Cosworth, our high quality RPM valve springs have been designed to let you run them higher RPM's safely without losing confindence in the reliability of the engine. With hours of testing and engineering, we have optimized our springs for the highest level of performance with racing use.

Our High RPM Dual Valve Springs have been manufactured using only the world's best Japanese Kobe steel and designed with more seat pressure and increased lift capability to maximize their valve control performance. Our final stride to acheive the highest quality spring was adding the dual chamfered ends to minimize weater and tear on the retainers and seats. These are factory OEM replacements and there is no machining or head alteration required for their high performing usage.

Spring Pressure

Pressure at installed height: 291 N

Pressure at 12.5mm Lift: 716 N

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