KIBBLEWHITE OEM Replacement Valve Spring Kit — Spring lift 0.400", open 330 lb, seat 95 lb – 57-83 Sportster

Designed to deliver reliable stock pressures and compatible with stock cam profiles, this valve spring kit restores correct valve operation. 🔧

Retainers, keepers, and bases are modeled using finite element analysis to maximize mechanical strength and long-term durability.

Springs are wound from super clean chrome silicon wire, heat treated and shot peened to resist fatigue and maintain consistent performance.

Manufactured to original O.E.M. specifications using modern materials and production techniques, and made in the USA for quality you can trust. 🇺🇸