DPF replacement pipe

[jkern]

I did the HS DPF delete pipe on my 2011 Ram sometime about 2013. Since that time i have been getting 15.5-17 MPG depending on driving and trip length. Lately i have noticed a significant decrease in MPG and when under the truck investigating an exhaust leak, found the bung in the pipe for the aft Nox sensor rusted out and the sensor hanging on the wires. I put a wide clamp on the hole and moved on. About 6 months ago the forward sensor has done the same. Over the last year or so i have noticed a significant decrease in MPG..like 12.5 to 14 tops. No CEL. My questions are the following:
Does the MiniMax tuner use the Nox sensor input for anything
Could this be the source of my decrease in MPG
Where can i get a new pipe with the bungs welded in..can't find one anywhere!

Thanks!

 

[Ozymandias]

Delete stuff is hard to get nowadays.
Better get some new bongs and let them weld in.

 

[Beast2B]

you may be better off finding a take off stock exhaust and coring out the filters. lots were removed early in their life, so maybe there are some barn units out there