Tag Archives: Black smoke

Cummins 6.7’s Biggest Fan (Part 4): Exhaust System Explained

August 16, 2010 | by | Leave a comment

In 2010, a new set of emissions standards meant that most diesel trucks required Diesel Exhaust Fluid (DEF) additive in order to pass muster. Thanks to the clean technology in the 6.7L Cummins turbo diesel, the 2010 Ram HD is … Read More >>

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