Isky 1.570 Valve Springs 9988RAD

When you're pushing your engine to its limits, stock valve springs become a liability. The Isky 1.570 Valve Springs (9988RAD) deliver the consistent lift and precise valve control needed for high-RPM reliability, whether you're building a competition engine or upgrading an existing platform. With a robust 550 lb/in spring rate and engineered damping characteristics, these springs prevent valve float and ensure your valvetrain stays synchronized with aggressive cam profiles.

The RAD-9000 dual-spring design combines a primary and secondary spring for stability across the entire RPM band, reducing harmonics and extending component life under sustained boost or high-revving conditions. This is a bolt-on upgrade that delivers measurable gains in valve control without requiring machine work.

• Isky 1.570 OD springs
• 550 lb/in spring rate
• Dual spring/damper design
• RAD-9000 series
• 1.150 in coil bind
• Set of 16 springs
• CNC precision manufactured
• High-RPM rated