Lock Up Clutch Kit – ’99-’17 Big Twin

Specifically designed to fit under the stock or aftermarket primary/derby covers and increase the capacity of your stock clutch by using stainless steel weighted arms that progressively increase pressure to the clutch as rpm increases; This also allows lever effort to be kept to a minimum – even with big-inch motors; Three different sets of six coil springs (light, medium, heavy) are included for a variety of spring pressure options; Coil spring design provides much smoother shifting and a more progressive, linear engagement compared to a diaphragm-type spring; Simple bolt-on installation is all that is required with no modifications needed; Made in the U.S.A.