1.650 NexTek Dual Valve Springs

The MANLEY 1.650 NexTek Dual Valve Springs are designed for high-performance engine builds that require precise valve control, especially in aggressive cam profiles and elevated RPM ranges. These dual springs are crucial for enthusiasts and professional shops looking to upgrade from stock valvetrain geometry to support performance camshafts, turbocharging, or nitrous applications.

With an installed height of 1.650 inches, these springs fit engines that need tighter valve seating pressure without compromising reliability or longevity. The NexTek dual spring design offers superior harmonic damping and fatigue resistance compared to single-spring alternatives, effectively reducing the risk of valve float and maintaining consistent seat pressure throughout the power band.

Both professional engine builders and weekend warriors prefer MANLEY springs when installing performance camshafts, superchargers, or when pushing naturally aspirated engines beyond OEM limits. Proper installation requires careful attention to seat pressure specifications and accurate spring height measurement to ensure optimal performance.