Kibblewhite Precision Valve Spring Kit 20-20430 for Harley-Davidson

Kibblewhite Precision valve spring kit 20-20430 is a complete set for one engine. The kit includes interference-wound, double-chrome silicone springs, heat-treated steel base washers, and steel retainers. It is specified for .415-inch valve lift, a 1.375-inch installed height, 129-pound seat pressure, and 272-pound open pressure at .415-inch lift. The base washer is counterbored for a 0.665-inch outside-diameter seal. Replacement valve guides may require machining for special seals, and R-style valves may be required to achieve the correct installed height. Made in the USA.