Hey everyone, thanks for this thread, very useful information. I have a 2014 Fiesta ST with the MP215 package and am considering the MR230 upgrade as well. Given that the car is already 2 years old, the major question for me is whether installation of the MR230 will create issues at the DMV. Here in my state (Pacific NW, USA), the emissions testing is done strictly by plugging into the OBDII port and checking to see if certain OBD diagnostics report a "Ready" status ("Misfire, Fuel System, Component, Catalyst, Evap, O2 Sensor, Comm, DLC, MIL etc). The above posts seem to suggest that even after the install of the MR230, the OBD system would report readiness in these areas. Am I reading the posts correctly? Thanks.