1.260 Dual Valve Springs (16)

The PAC Racing Springs 1.260 Dual Valve Springs (16) represents a precision-engineered component designed specifically for circle track racing applications. These dual valve springs deliver a 610 lb/in spring rate and feature a 1.260-inch outer diameter, making them a direct fit for engines requiring OEM or performance-level valve control in competitive circle track environments. Supplied as a complete set of 16 springs, this product eliminates the guesswork of sourcing matched pairs for all cylinders.

PAC Racing Springs are engineered to maintain consistent valve train geometry across the full operating RPM range, which is critical in circle track racing where engine speeds fluctuate rapidly and valve float can cost horsepower and reliability. The 1.115-inch coil bind specification ensures the spring compresses safely to its solid height without binding prematurely, a key consideration when stacking dual springs for increased load capacity. The 610 lb/in spring rate is calibrated for moderate-displacement circle track engines, providing adequate control without excessive preload that would increase parasitic loss or demand heavier pushrods. Matching all 16 springs in a single set reduces variability in valve opening and closing dynamics across all cylinders, which directly impacts combustion consistency and power delivery.

This spring set is purpose-built for circle track competitors and engine builders working with naturally aspirated or moderately boosted circle track platforms. Whether rebuilding for a new season, replacing worn springs that have lost rate due to fatigue, or upgrading to a matched set for first-time construction, these PAC Racing Springs deliver the precision and consistency required in competitive racing environments where every tenth of a second matters. The complete 16-spring set simplifies sourcing and ensures no cylinder is compromised by a weak or mismatched spring.