Out of stock
SKU: COM26921-16
UPC: 036584087441
MPN: 26921-16
The COMP Cams 1.300 Dual Valve Spring Kit for GM LS1 is a high-performance dual-spring assembly engineered for naturally aspirated and forced-induction LS1 engine builds. This set of 16 dual valve springs delivers the spring rate and coil bind characteristics required for sustained valve control across aggressive cam profiles and elevated RPM ranges typical of street performance and racing applications.
Specified at 408 lb/in spring rate with a 1.040-inch coil bind dimension, these springs are engineered to manage valve lift and prevent float without introducing excessive seat pressure that can accelerate wear on cam lobes and valve train components. The 1.320-inch outer diameter integrates with factory and aftermarket LS1 cylinder head packages. COMP Cams' dual-spring design provides the damping control needed to suppress harmonic oscillation and maintain consistent valve timing across the RPM band—a critical factor when running elevated boost pressures or aggressive valve events on built LS1 engines.
This kit is intended for LS1 engine builders, street performance enthusiasts, and race-engine technicians preparing power plants for track duty, drag racing, or high-output street use. The springs are installed as part of a complete cylinder head assembly or top-end refresh, paired with matched pushrods, rocker arms, and cam profiles to ensure balanced valvetrain geometry and performance.
COMP Cams' valve spring offerings have established themselves as a standard in LS engine performance across both naturally aspirated and turbocharged platforms. The dual-spring design is a core technology for managing the complex harmonics and loads imposed by modern aggressive cam profiles, making accurate spring specification and installation essential to long-term engine durability.
Proper installation requires cylinder head removal and professional assembly by an engine technician familiar with LS1 valvetrain geometry. All hardware and pushrods should be verified for compatibility before final assembly.
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