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Re: Extended Parking and DEF
Posted to HD/Fleet Forum on 4/18/2020 2 Replies

The particulate filter is for PM. PM 2.5 to be specific.

SCR is for NOx reduction. Both are aftertreatment components. They live in the same pipe, but do different things.

In your example, What if the SCR cat is behind the DPF? Login to read more.

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