1.600 Dual RAD Valve Springs

The 1.600 Dual RAD Valve Springs from Isky Cams are precision-engineered valve springs designed for high-performance engine builds and aggressive cam profiles. These dual springs are essential for serious engine builders and mechanics tackling racing applications, street performance rebuilds, or modified carburetor and fuel-injected powerplants that demand reliable valve control at elevated RPM.

Isky's dual RAD (Radial Advance Design) springs utilize a nested, dual-wire configuration that maintains consistent load rates across the full lift spectrum while minimizing surge and harmonics at high RPM. The 1.600-inch outer diameter and carefully calculated spring rates work in tandem to control valve seating velocity, reduce distortion under sustained load, and extend service life compared to single-wire springs.

Mechanics and engine builders installing aggressive aftermarket cam profiles—anything exceeding 0.450-inch valve lift or 240+ degrees of duration—should specify these springs to match their camshaft's design. The compact design ensures fitment in tight cylinder head configurations, making them a versatile choice for various performance applications.