It seems that in Europe, there are companies specializing in removing DPF's from diesel cars and removing all traces of DPF software from the ECU.

Part of the 2010 recipe for on hwy vehicles.....passenger cars. light trucks and Class 6-7-8 was to use Urea. The SCR Catalyst removes NOx, and is after the DPF, that removes soot. Both have sensors for temp and pressure, and are integrated with the engine ECU. Continuous calculations by the ECU will signal if iether is removed, thus the required defeat protocol approved by the EPA.

The EGR circuit is a bit more complex, and not easily removed. It's all around the engine, turbo and cooler circuit, so it's not something you can just un-bolt. The pumping losses from the EGR are minimal. The need for EGR is to put some amount of inert gas into the cylinder to control combution and production of NO2. Inert gas is basically exhaust gas with no oxygen.......so no O to make NO2.

It's not you father's diesel (1978 Oldsmobile) so it's not worth tinkering with when you have a 4 year warranty.

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