KIBBLEWHITE OEM Replacement Valve Spring Kit — Spring lift 0.415", seat pressure 129 lb, open pressure 272 lb – 48-65 Big Twin

OEM replacement valve spring kit engineered to restore stock pressures and remain compatible with original cam profiles. ✅

Retainers, keepers, and bases are modeled with finite element analysis (FEA) to maximize mechanical strength and reliability. 🔧

Springs are wound from premium spring wire, then heat treated and shot peened for consistent performance and improved fatigue life. 🇺🇸

Manufactured to original O.E.M. specifications using modern design protocols and production techniques for precise fit and dependable operation.

Kit includes:

• 4x valve springs
• 4x heat-treated steel retainers
• 4x steel basewashers
• 4x steel keepers (pair)

Made in the USA — quality controlled and ready for direct replacement. ⭐