DPF CAT Delete - Ford Powerstroke Diesel Forum
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Old 05-12-2013, 05:32 PM
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DPF CAT Delete

Ok - Very new to the diesel world. I purchased a 2009 F250 4x4 with 72k on it. Runs great an drives great as long as there is a diesel pump close by.

Here is my question. After looking at a few pictures of the factory exhaust I think there is a muffler down stream of the DPF that has been deleted. Not sure but the welds do not look factory.

Do I need to have one installed before it is inspected? The truck is rather quiet.

Next I am thinking about deleting the DPF and CAT.

If I remove them is it practical to slip them back on for the inspection?

Looking at these $175 to $225 dollar kits they seem simple enough.

If I delete them do I need a chip or programmer?

If I am understanding this right the DPF has a small line on top that dumps fuel into it and burns off the soot. So when I tie this back in where does the fuel go? Is it just a blocked port?

Thanks for the help.

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Old 05-12-2013, 05:54 PM

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As for the inspection part of your question i cant help much because fortunately Alabama does not require the emissions testing like TN does. If a cop ever sees someone black smoke round here he will probably pull you over just to ask you what tune your running.

If you delete the DPF then you will need to have a programmer as well. This programmer must have DPF off capability. 97 percent of the sound that you hear on straight piped trucks comes from the DPF and CAT being replaced by a pipe. The only difference i noticed in my truck was when i took off the muffler i could hear more of a rumble in the cab (i ran without DPF and CAT for a year before i removed muffler). Keep in mind that if you are trying to "fool" the cops into not thinking your truck is in violation of emissions standards then muffling the sound as much as possible is the way to go. When everything is deleted it is a very distinct sound if you know a lick about diesel trucks.

Like i said before i can not help much on the emissions testing advice because i have lived in Alabama my whole life. However it is safe to say that when you go to get tested, you best have all your emissions equipment on your truck unless you hollow out your DPF and leave just the shell on there.
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