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Hello all,

I have a 2017 Ram 3500 6.7 I 101K miles...and want to remove/delete DEF. Do i need to remove EGR also? From what I am seeing, no... Please let me know your thoughts...Thanx

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Ryder...There's a good deal of controversy around delete kits and their legality.  We've had two discussions regarding EGR/DEF deletes on late 6.7L Cummins engines and chassis.  You will find this information helpful:



Others may want to add information or comments.  I believe it's wise to maintain a properly functioning EGR system.  The weaknesses in the Cummins 6.7L's EGR cooler have been addressed with improved aftermarket cooler systems.

Many owners and buyers need vehicle emissions inspections and tailpipe tests at registration renewal or transfer of ownership.  Modifications or parts deletes are considered tampering with an emissions system.  In many states, the vehicle will fail the emissions test or worse.  For emission legality, an aftermarket product like an improved EGR cooler should bear a California Executive Order Number, which would make the device legal for use in all 50 States.


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