IRP Flex Disc LK78 M12, BMW E30, E36 Stops the unwanted rubber flex and transfers power from the transmission to driveshaft instantly.  CNC machined aluminium flex disc keeps the joint firm and polyurethane bushings gives just enough of dampening to prevent your transmission from damage. Replaces OE: 26111227410; 26111227869 Features: 90 SH polyurethane inserts 78mm diameter M12 bolt fitment Includes: 1 flex disc 6 washers Note: When installing make sure that all driveline components are in good condition, properly balanced and precisely aligning.