Isky 1.625 Valve Springs 9945RAD

High-revving engines demand valve springs engineered to maintain precise lift and closure at extreme RPMs—and the Isky 1.625 valve springs deliver the reliability needed for sustained performance. With a robust 550 lb/in spring rate and dual-spring design, these springs eliminate float and ensure consistent valve timing across your entire powerband. Whether you're building a dedicated race engine or upgrading a street machine, this proven Isky design gives you the control and durability required when precision matters most.

• Dual spring damper
• 550 lb/in rate
• 1.625" outer diameter
• 1.180" coil bind
• Set of 16 springs
• RAD-9000 series
• Precision engineered