Seems as though Toyota wants in on some of that 5 L Cummins action
http://blog.caranddriver.com/toyota-tundra-does-a-titan-move-turns-to-cummins-for-a-diesel-v-8/
http://blog.caranddriver.com/toyota-tundra-does-a-titan-move-turns-to-cummins-for-a-diesel-v-8/

except for the fact that this years tundra is ugly as h3ll and the 2016 will probably still look the same, that diesel one may change my mind