Deleting SCR/DPF/DEF/ETC vs. just EGR
I am sure this has been discussed at great lengths, but I can't seem to find a definitive answer.
I know the EGR delete will eliminate the oily soot build up in the intake. Will it result in any other benefit?
The SCR/DPF delete allows for reduced maintenance and the ability to run a turbo-back exhaust. This would also increase performance, sound and smoke.
I want to do both, but it seems most tuners will not do this due to either EPA or the need to do further testing or concerns with lack of required back pressure that the turbo is designed to have.
Can someone please settle this for me?