DPF Delete Pipe & ECU Reflash Source

[Ozer]

So im in NY and we have emissions but nothing gets put in the tailpipe to sniff anything.
My DEF tank has an error code of P205C and i dont feel like spending all that money to get a new one, im at 105k miles.
If i get this delete pipe and install it, put the sensors in and clear all codes will i pass inspection, considering everything else is good to go? The ECU needs to be coded as well correct?

Also, what happens to the DEF tanks when this delete is done, can i still keep the CAT and the muffler in? Im not looking for loud exhaust, just want to have a worry free diesel w/o all this clean burning crap.