i am new to this forum, so i do not know if this has been answerd yet or not. i have a 2008 6.7 cummins, i want to do a DPF delete and was wondering if it was legal or not. how do you smog the vehicle with the emissions gone? i was also told that the emissions law does not go into effect untill 2010, therefore they can not enforce the DPF untill then.