1.250 Valve Spring Kit Single w/Damper

The HOWARDS RACING COMPONENTS 1.250 Valve Spring Kit Single with Damper (MPN 98214-K11) is a precision engine component engineered for high-performance and racing applications where valve control under extreme conditions is critical. This single-spring assembly delivers a spring rate of 411 lb/in with an integrated damper to control harmonic oscillation and prevent spring surge at elevated RPM—a fundamental requirement in engines operating at or beyond 7,000 RPM where valve float becomes a real failure risk.

The 1.250-inch outer diameter spring pairs with chromoly steel retainers and locks, providing the thermal stability and durability necessary for sustained high-RPM operation. Each component in this kit is designed to work as a system—the damper absorbs vibration that would otherwise fatigue the spring prematurely, while the chromoly retainers withstand the cyclic loading imposed by thousands of valve events per minute without distortion or creep.

This valve spring kit is suited for engine builders and racing enthusiasts preparing small-block and mid-sized engines for competition. It addresses the specific challenge of maintaining consistent valve timing and lift as engine speed increases—a problem that stock springs cannot reliably solve. Whether used in circle-track racing or drag racing, this kit is designed to meet the demands of high-performance applications.