Custom fork cups with stop for Big Twin. The lower fork cup of this pair has an integrated fork stop that is a necessity due to the design of many custom Big Twin frames. This chrome plated steel pair includes a staking pin and a corresponding hole in the lower cup. Simply drill the frame neck for pin installation. Also included are two pre installed Timken bearing races (bearings not included). Use with part #C3412 bearings. These cups are designed to be used with OEM style FXR or Dyna lower fork brackets or custom lower fork brackets with upright fork stop nubs. Fits Big Twin frames with removable fork cups.