KIBBLEWHITE Valve Spring Kit - Big Twin 20-20435

Factory valve springs lose their tension over time, compromising combustion efficiency and risking valve float at high RPM. The KIBBLEWHITE Valve Spring Kit restores OE performance specifications with precision-engineered dual springs that maintain consistent lift across your engine's entire operating range. This is essential maintenance for Big Twin engines running hard, whether on the street or track.

KIBBLEWHITE's dual super clean chrome silicon springs are heat-treated to withstand repeated cycling without fatigue or permanent set. The included heat-treated steel base washers distribute load evenly across the valve seat, while the steel retainers lock everything in place. You get the reliability of factory engineering with the durability of a purpose-built racing component—all domestically manufactured to exacting tolerances.

• OE style replacement kit
• Dual chrome silicon springs
• Heat-treated steel washers
• .415" lift specification
• Includes steel retainers
• Big Twin fitment
• Made in U.S.A.
• MPN: 20-20435