Description
Valve spring selection is critical for engine reliability at high RPM, and the Isky 1.570 delivers the consistent load rate and damping characteristics needed for aggressive cam profiles without sacrificing durability. Whether you’re running a small-block build or upgrading an existing stroker, these dual-spring assemblies provide the control and consistency that separates a tuned engine from a bulletproof one. The RAD-9000 series is engineered to prevent valve float and harmonics across a wide RPM band, keeping your valvetrain stable when it matters most.
- Dual spring damper
- 710 lb/in rate
- 1.570 in OD
- 1.200 in coil bind
- Set of 16 springs
- RAD-9000 series
- Isky manufactured
- Bolt-on installation






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