.500 -- .600 Spring Lift Kit For Shovel

.500 -- .600 Spring Lift Kit For Shovel. F61993

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This .500 -- .600 lift kit is for Big Twins with titanium collars and valve keys part #F6287. Features a special tri-spring (outer/intermediate/inner) interference fit to reduce harmonics and control spring surge. Installation tool part #97-53 is required for installation and complete instructions are included.