Hemi/481x/SBC/BBC .375" hex pump extension fuel pump drive shaft. This shaft starts from a piece of .750" titanium barstock and is gun drilled to be lightweight. This shaft uses a .625" hex on the cam drive end and a female .375" hex to drive the pump. Can be used to drive and Enderle,Waterman,Hilborn, Rage or a DSR fuel pumps. Shaft is 6.875" long.This shaft weights half of what a steel fuel pump drive shafts weights.