Seller notes

Use on Twin Cam 88™, standard O.D. is .8425”, Sportster 2000-present, and Buell® 2000-present.Performs like a hydraulic tappet up to 5500 rpm, then turns into a solid tappet. When it turns into a solid tappet, it adds approximately three to six more usable horsepower. Prevents hydraulic pump at high RPMs. Made in the U.S.A. New in sealed/oiled bags w/box. These were part of a performance upgrade for my 2001 XL 1200 S along with the pistons I have listed but fate had another idea....

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