i am looking at buying a ram 2500 cummins from texas. does anyone here know if i would have any problem registering it in cali? even though diesels are smog exemp i would like to know if there is something that cali would still say about it.

i don't think you will have too much of a problem. I sold one to a guy in California from here in New Mexico and as long as the paper work was in order, he had no problem. He did have to pay a #*@!#! load of taxes.... Good luck.