1.290 Dual Valve Springs 16pk

The STRAUB TECHNOLOGIES INC. 1.290 Dual Valve Springs 16-pack (Part Number 110-1821) represents a precision engine component engineered for high-performance applications requiring consistent valve control across extended operating ranges. This dual-spring set delivers a 355 lb/in spring rate with a 1.200-inch coil bind specification, making it suited for engine builds demanding reliable valve seating and rapid valve actuation in demanding duty cycles.

The dual-spring design provides superior stability compared to single-spring configurations by reducing harmonic vibration and flutter at high RPM while maintaining consistent load characteristics throughout the valve lift cycle. The 1.290-inch outer diameter specification ensures compatibility with standard valve spring seats found in most modern performance engine platforms. The 355 lb/in rate strikes a balance between aggressive valve control and component longevity, preventing valve float while minimizing stress concentration on associated drivetrain components. Each 16-pack contains enough springs for a complete eight-cylinder engine rebuild, eliminating the need to source multiple smaller quantities.

This product is specified for engine builders, performance shops, and technical enthusiasts undertaking complete engine overhauls where factory valve spring specifications have been exceeded or where upgraded valvetrain geometry requires stiffer spring rates. The STRAUB brand positioning within the precision fastener and engine component sector indicates suitability for applications ranging from street performance to track-focused builds. Proper installation requires alignment with compatible valve lifters, pushrods, and rocker arm geometries to ensure the spring rate does not introduce binding or preload complications.