Dual Valve Springs - 1.557

The HOWARDS RACING COMPONENTS Dual Valve Springs – 1.557 inch OD is a high-performance dual spring assembly engineered for maximum effort racing engines where sustained RPM and valve control are critical. This set of 16 valve springs features a 471 lb/in spring rate and 1.150 inch coil bind specification, delivering the aggressive valve train response required in competition applications. The 1.557 inch outer diameter makes these springs compatible with standard small-block and mid-range engine heads, providing a direct upgrade path for racers looking to increase valve lift capacity and responsiveness.

The dual spring design with damper functionality is specifically engineered to control harmonic vibration and valve float at extreme RPM levels. The 471 lb/in spring rate provides sufficient preload to keep valves seated under high-lift cam profiles while the damper element reduces resonance that can lead to premature spring failure or erratic valve timing. At 1.150 inch coil bind, these springs maintain adequate clearance during full valve lift while preventing bottoming—a critical consideration in high-horsepower applications where margin for error is minimal. The 5.73 lb set weight reflects their robust construction and premium spring steel composition.

These valve springs are purpose-built for circle-track racing, bracket racing, and dyno-focused street performance builds where valve train stability directly correlates to power output and reliability. Competitors running aftermarket camshafts with aggressive lift and duration specifications depend on this spring rate to prevent valve float and maintain consistent ignition timing. The damper technology sets this design apart in applications where standard single springs cause excessive vibration at 7,000+ RPM, resulting in measurable power loss and component wear.

HOWARDS RACING COMPONENTS is recognized in motorsports for precision valve train components that meet OEM and competition standards. The 98635 part number has become the baseline specification for small-block builds requiring damper springs in this size range. Proper installation requires careful shimming to achieve target seat pressure and checking clearance at full lift—critical steps that separate successful valve train upgrades from costly failures.