Hummm, there is no Ingalls 594's listed at the Ingalls web site for 2013 E450"s.
Even called them up and the person I talked to wasn't sure either. Did Ford make a change from 2012 to 2013 that makes them unnecessary?
About got my RV all loaded up and ready to take to an alignment shop. Would really like to get it all done in one shot.
Retired and loving it.
Got a new 2014 Grayhawk 31DS
Hoping to get away from the IL winters