Upgrade your factory lifters/tappets to these high performance versions manufactured by Feuling. Used in many DarkSide motor builds.

  • Manufacturer Part No: 4050
  • Made from cold headed 1018 steel with heat treated hardened surface
  • CNC machined, precision ground & pressure tested
  • Designed for use with high lift camshafts & higher spring pressures in performance builds
  • Increases valvetrain stability & decreases valve float
  • Fits 2017-later Milwaukee 8
  • Fits 1999-2017 Twin Cam
  • Fits 2000-2021 Sportster
  • Kit includes 4 x hydraulic roller lifters/tappets


  • Installation may require additional work depending on application

Be sure to contact the DarkSide team for expert advice on fitment for your bike before ordering.