I talked to Dr. performance earlier this week, and they said that they will be releasing their DPF delete kit should be out soon. It will be offered in a couple different arrangements and there will be a code free kit. They suggested to me to only get the 4" kit, it has had the best results.
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2007 3500 Sport 6.7L 4X4 DRW 6 Spd Auto, Brillant Black, K&N drop in, DPF Delete soon