GKTECH F8X M2/M3/M4 DUAL MOUNT DIFF BRACKET (Order in)NOTE: This item is specially ordered from GKTECH Australia and usually takes around 3 4 weeks to arrive. Listing is for: 1x Dual mount diff bracket The GKTECH dual mount diff brace provides additional support to the diff in your F8X BMW resulting in reduced wheel hop under hard driving conditions. The OEM diff cover uses just a single bush and stud which is prone to premature wear and excessive movement which can cause the rear stud to break off the