Dry sump/fuel pump driver mandrel register ring. Some times the crank hub does not stick out far enough thru the blower pulley to register the drive mandrel allowing for the mandrel to not run concentric with the crank shaft. If you have a mandrel that is running out of concentricity keeping belts on the motor to drive the oil or fuel pump will be diffucult.
This mandrel register ring can be used with RCD drive mandrels or any fuel/dry sump mandrel that uses a 2.00" female register. Made from billet alum. the register ring measures 2.002" x .500" x 1.850". Perfect so you can warm up your part drop in the register ring and it will have a nice snug fit.