Does anyone know where I can find a exhaust manifold egr plug? Or perhaps someone has an extra one laying around? Thanks in advance

I have heard you can tap it for a 3/4" NPT pipe plug.

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2005 CRD, owned since new.
GDE Hot tune, 2.5" lift w/JBAs, 235/85 Duratracs, Weeks2 kit, Provent, Facet lift pump, Cat fuel filter

There is a thread about tapping it. I believe it was posted by racetracer. Try the search advice from outside forum.

But if you are deleting the egr as I suspect you will no longer need the tube that runs from there to egr behind the engine and could either block it off at other end or do what I did. I just put the tube in a vise and bent it till it creased near the manifold end and then cut it off just past the bend and put a little high temp silicone inside to make sure it sealed totally. You could also weld it at the crease or cut it off without bending it and weld cap over it to close it off . My method you have to use the v-band clamp that was used originally but so did the old weeks kit.

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05 Blu LIM, OME GDE Tbo, wk II 245/75/17, KC Lights, bull bar, 195K H TC
05 Blu Lim, Dayton, GDE HT, 255/75/18 , 210K , H TC
06 Bla Lim, GDE Eco, Destination AT 245/75/17, 151K, H TC
06 D Khaki Lim 126K wkII Eur TC
05 D khaki Lim 145k refurbishing
All CRDS: Fumoto, Lift , Fan Shroud mod, fuel head Gen II, SAMCOS,self TB, 2 Mic filt, Hayden

Here is a link to the thread
viewtopic.php?f=5&t=86993

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05 Blu LIM, OME GDE Tbo, wk II 245/75/17, KC Lights, bull bar, 195K H TC
05 Blu Lim, Dayton, GDE HT, 255/75/18 , 210K , H TC
06 Bla Lim, GDE Eco, Destination AT 245/75/17, 151K, H TC
06 D Khaki Lim 126K wkII Eur TC
05 D khaki Lim 145k refurbishing
All CRDS: Fumoto, Lift , Fan Shroud mod, fuel head Gen II, SAMCOS,self TB, 2 Mic filt, Hayden

And here is the block off plate dimensions for other end courtesy of WW diesel
viewtopic.php?f=5&t=76576

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05 Blu LIM, OME GDE Tbo, wk II 245/75/17, KC Lights, bull bar, 195K H TC
05 Blu Lim, Dayton, GDE HT, 255/75/18 , 210K , H TC
06 Bla Lim, GDE Eco, Destination AT 245/75/17, 151K, H TC
06 D Khaki Lim 126K wkII Eur TC
05 D khaki Lim 145k refurbishing
All CRDS: Fumoto, Lift , Fan Shroud mod, fuel head Gen II, SAMCOS,self TB, 2 Mic filt, Hayden

Thanks for all the info. I ordered the kb diesel performance kit but it doesn't have a manifold plug.