Feuling Compensator Spring Replacement for Harley Big Twin Engineered for improved performance, this compensator spring offers greater strength and a steeper bevel than OEM versions. The enhanced preload applies more pressure to the spring pack, reducing unwanted movement and vibration. This upgrade supports smoother engagement, easier starting, and improved low-RPM response. Features: Additional spring for OEM 40384-83 / 40267-85 / 40384-91 / 40356-06 / 40356-07 Direct upgraded replacement for 85-99 Evo, 99-11 Dyna/Softail, 99-10 Touring, 99-09 CVO Made in the USA