I've got a '01 LB7 with ~400K on it. Looking to upgrade, but not sure that I want the newest DMax model. Friend mentioned a 2009 (LMM?) with a "B motor". What is a "B motor"- if such a thing exists. Word has it those in the truck pulling competitions are looking for these.

Also noted some posts on the LMM and the regen routine required- as well as the poorer fuel mileage. Is this to say the LMMs have the anti-pollution equipment on them or doesn't that come in until 2011?

Any help would be appreciated.