JIMS Hydrosolid Tappets — 0.8425" diameter – 84-96 Touring, 85-89, 91, 93, 99 Softail, 94-95 Dyna, 84-86 Big Twin, 84-94 FXR, 99-00 CVO, 86-90 Sportster
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Performs like a hydraulic tappet to 5,500 rpm, then converts to a solid tappet to add about 3–6 usable hp. Prevents hydraulic pump-up; requires adjustable pushrods. Made in the U.S.A.