Feuling HP+ Hydraulic Tappets Lifters Set 99-2017 Harley Sportster Big Twin CamBRAND NEW Part # FM 4000 or 4000 or 499101 or 0929 0005 Fits: 1999 UP Twin Cam and Milwaukee 8 Motors, 2000 UP XL CNC machined and precision ground When used with Feuling's oil pump, they will increase critical oil flow to valves, valve springs, rocker shafts and valve guides Can also be used for OEM replacements Sold in a set of four Made in the U. S. A. Accept most stock oil lines or custom steel braided lines.