dpf delete pipe size question

[geereed]

I am looking to put a dpf delete pipe on but i am not sure of the size. My truck came with a MBRP 4 inch dpf back exhaust. I see there are 3 1/2 inch 4 inch dpf pipes. I am not sure what one to get that will fit in the exhaust i have. I assume my exhaust must get smaller at the dpf filter the way it is now but dont know.

[MrMike06]

You might one to take a quick look under your truck just to make sure. MBRP does have a 3.5" to 4" adapter that clamps on the dpf and exhaust. You should be able to take the reducer out and run a 4" delete pipe without an issue. The 4" delete will bolt to the factory downpipe without any modifications. Hope this helps.