1.550 NexTek Dual Valve Springs

The 1.550 NexTek Dual Valve Springs by MANLEY are essential for automotive enthusiasts and mechanics focused on building high-revving engine combinations that require exceptional valve control and reliability. These springs are designed for both competitive and street applications, particularly where stock springs fall short in managing aggressive cam profiles.

Featuring a 1.550 seat diameter, these dual valve springs ensure compatibility with modern cylinder head designs while providing the necessary stiffness for sustained high-lift operation. The NexTek dual-spring architecture incorporates precisely wound inner and outer springs that work together to maintain constant control over the valve lifter throughout the entire lift and duration window, effectively preventing valve float.

Ideal for those assembling stroker motors or upgrading forced-induction platforms, these springs deliver improved spring rates without the stack height penalties of traditional designs. This allows for fitment in tight cylinder head assemblies while maintaining optimal preload characteristics, making them a proven choice for both aftermarket and OEM applications.