looking for a 3 1/2" down pipe

[IanThrones]

After purchasing a fifth wheel RV (31' outback) and towing it 1300km home I need to quiet my truck down its way too loud when pulling hard so what I want to do is put a stock size down pipe but mandrel bent with out the dimpling and reinstall the cat and turn the 4" turbo back in to a cat back So my question is where can I get a pipe like this or is there such a thing to be had and what else whould I need?
Also this was the first load I hauled with the 6.0 I must say it pulls awesome I'm very impressed I went through the Rocky's from BC to Alberta and no hill could put it under 55mph even with 35"s however the fuel millage went out the window

[HeavyAssault]

The OEM DP is more like 3" and sounds like you will need to swap out with someone looking to upgrade. I'll help fund the swap if you need to sell off the MBRP downpipe.

Maybe some header wrap around the DP and reinstalling the cat would be a better fix?

[IanThrones]

Thats a thought too most of the noise is the echo against the trailer I did some searching and I can get a 3 1/2 dp thats a direct factory replacement fit it think I'll install one of those with the cat going into the mbrp duals

[mdiesel]

if u put your cat in it will make a huge difference


Matt

[IanThrones]

I think that will do it its a shame i love the sound just bombing around town