1.564 Dual Valve Springs (16)

The 1.564 Dual Valve Springs from PAC Racing Springs are purpose-built for high-performance circle track racing engines where precise valve control and durability under sustained RPM loads are non-negotiable. This set of 16 dual valve springs delivers the engineering precision required by circle track competitors who demand consistency across all cylinders. Whether you're building a fresh engine package or refreshing valve train components, these springs provide the reliability needed for competitive racing environments where margin for error is minimal.

The dual spring design incorporates a damper to manage harmonic vibration and prevent valve float at high RPMs, while the 525 lb/in spring rate ensures crisp valve closure and consistent lift characteristics. With an outer diameter of 1.564 inches and a coil bind specification of 1.145 inches, these springs are engineered to maintain proper seat pressure without over-stressing valve stems or guides. PAC Racing Springs' manufacturing tolerances ensure that all 16 springs in this set perform identically, eliminating variance that could cause uneven cylinder performance or combustion inconsistencies during racing conditions.

Circle track racers—from short-track stock car competitors to limited-late-model drivers—benefit from the proven performance of PAC's 1300 Series springs when combined with compatible valve seats, retainers, and dampers. Installation requires precision assembly with proper spring heights and pressures verified against manufacturer specifications to ensure optimal valve train geometry. These springs are compatible with standard 1.564-inch OD spring seats and work seamlessly in engines designed around 1300 Series valve spring packages commonly found in domestic racing engines.