Radium Engineering lift pump extensions kit These lift pump mounts do not come standard with any FCST-X. They were designed specifically for 39mm OD fuel pumps. But because these brackets are so long, different diameter pumps can be used. These lift pump mounts permit an additional 4-1/8" (105mm) over the long 20-1213 mounts provided with the 20-1990-XX, 20-1992-XX, 20-1993-00, and 20-1995-00 FCST-X. This is measured from the underside of the fill plate to the bottom of the lift pump filter sock. But these brackets are very forgiving with respect to fuel cell depth. If modifying to a specific fuel cell depth, simply cut to length using a band saw, cut-off wheel, etc. NOTE: Longer hose and/or wiring may be necessary.