1.540 Dual Valve Springs

The MANLEY 1.540 Dual Valve Springs (MPN 221461-16) are precision-engineered components designed for serious engine builders and high-performance enthusiasts who demand reliability under extreme valve train stress. These dual springs are essential for preventing valve float at elevated RPMs, a critical failure mode in both naturally aspirated and forced-induction applications.

The dual-spring design reduces resonance harmonics and distributes load across multiple contact points, dramatically improving stability compared to single-spring alternatives. With an outside diameter of 1.540 inches, these springs ensure compatibility with standard spring seats and retainers while optimizing spring rate progression. The inner spring manages light-load frequencies, while the outer spring engages under high-RPM acceleration, maintaining consistent pressures across the entire RPM band.

Engine builders installing performance camshafts, whether for street-strip engines or extreme race applications, will find these springs provide the consistent control necessary to keep the valvetrain synchronized with aggressive cam timing. Manufactured to MANLEY's exacting tolerances, these springs are shot-peened for fatigue resistance and finished to prevent corrosion, ensuring long-term durability in both street and race engines.