the MY 2008 isc is ecm reprogramable, i havent found a chip so to speak.
however i have found a few places that will reprogram the ecm to allow you to remove the dpf pipe and go without it....but for 2500 i choose to save the money and spend it for fuel
USN Retired, Life time member of the DAV.
Enjoying the 2008 Damon Tuscany 4056, #3998 no your eyes are fine, there are really 6 slides
2022 F150 King Ranch or 2012 Edge toads