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No on the urea injection. The Dodge Cummins 6.7L met the 2010 standards when introduced in early 2007. There are no changes for 2010/2011. And it is the only one that will not require urea injection.
on edit -- I guess I should qualify my response. The 4500 and possibly the chassis cab version of the 3500 (not sure on that one) the engine will require urea injection. For the regular 3500 and 2500 no urea injection is involved. I have no idea why the larger trucks do require it and the 3/4 and 1 ton non chassis cab trucks do not.
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