New tow vehicle...6.4 hemi or Diesel?

Cudafever said

Agreed
But the eng brake was only a dealer install, and only on standard transmissions. come standard on all 6.7

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not true, the 2012 Ram Cummins comes standard with the engine brake, both on Automatic and Manual transmission, Installed by Chrysler as standard equipment on all Cummins equipped Trucks 2012.