1200-Series Ovate Beehive Valve Spring Set

The PAC Racing 1218-16 is a high-performance set of 16 ovate beehive valve springs engineered specifically for GM LS-Series cylinder heads. As part of the 1200 series, these springs are designed to serve as reliable replacements for factory components or to handle the increased demands of modified engines pushing beyond OEM capabilities. Technical specifications include a spring rate of 313 lb/in, a 1.290-inch outer diameter, and a coil bind height of 1.140 inches. Their beehive shape and ovate wire construction offer improved harmonics and endurance compared to standard springs. While they are a direct-fit solution for many LS-based platforms, builders should verify valvetrain geometry and lift requirements for their specific camshaft and rocker arm configuration before installation.