The update for the clean grain elevator is a larger sump on the bottom end. Couldn't find the kit number in the productivity support kit book. 2388 may already have this installed. Will need the third lift cylinder kit pn137856A2 for 60"feeder 137857A2 with a rock trap. Better check the parts book because I also think the channel that the cylinders attach to under the feeder is also heavier on this machine. If your machine is equipped with field track would also consider the plastic slide ki 416757A1 (slicker material and larger bolts) and the slide support angle ki 416756A1 due to the increased weight of the 12 row head. Also look at your tire carrying capacity.