Seller notes

Pro Valve Racing takes a scientific “System” approach when designing our Valve spring kits. Each component is designed to work with the others as part of the complete system.Pro Valve Racing's engineers use proprietary design and simulation software.Our design, simulation, and manufacturing processes insure compatibility of thevalve spring’s force and natural frequency with the cam profile, valvetrain mass,system harmonics, and the engine RPM.Our spring manufacturing partners are U.S based...

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