1.307 Valve Springs - Ovate Beehive (16)

PAC Racing Springs 1.307 Valve Springs in the Ovate Beehive design deliver engineered performance for high-RPM engine builds. This set of 16 springs represents a complete valve spring upgrade for engines requiring precise spring rates and reliable bind characteristics. Beehive-style valve springs are engineered to reduce mass while maintaining the stiffness necessary for aggressive camshaft profiles and extended valve lift.

The 340 lb/in spring rate suits applications running significant valve lift and high-RPM operation where adequate spring force prevents valve float and maintains consistent valve control. The 1.307-inch outer diameter fits standard spring pockets on many small-block and mid-displacement engines. The 1.100-inch coil bind specification defines the maximum compression point—a critical safety parameter that prevents the spring from binding prematurely and damaging the valve train. These specifications work together to provide predictable preload and consistent seating force across the engine's RPM range.

Engine builders and performance enthusiasts targeting street or competition builds with upgraded camshafts rely on precision valve springs to manage the increased demands placed on the valve train. PAC Racing Springs RPM series products are designed for serious builders who cannot afford valve float or inconsistent performance. Proper valve spring selection requires matching spring rate, bind height, and outer diameter to your specific engine specifications and intended use.

A complete valve spring upgrade typically involves all 16 springs (one per valve on a 16-valve configuration). Verify your engine's exact requirements before ordering, as incorrect spring rates can compromise valve train reliability and engine performance. PAC's beehive design represents an optimization for weight and consistency within the performance spring category.