I have a 2012 F250 6.7 that has on it 29k miles i have installed a banks ram air and banks exhaust from the dpf back. I have had these two mods installed since the vehicle was new. The truck had no emission system issues until about 27k miles then I had 5 error for the exhaust fluid system. The truck has been out of service on and off for about 10 days and ford has not yet solves the issues. Ford is claiming that the banks ram air has damaged the system. which i can not believe. Now i have a cracked dpf which they claim was damaged by the banks ram air. Ford will do no more testing until i return the air intake to factory stock. I will do that now and see where this goes. i am also concerned about an emission systems putting the vehicle in limp mode. I feel this is unsafe and totaly unreasonable. Right now Ford will not warranty the dpf. Any comments or feedback would be appreciated