Adblue removal in remapping can include an option to turn off the AdBlue system electronically. This involves altering the vehicle’s Engine Control Unit (ECU) so it no longer requires AdBlue to operate or to prevent warnings or limp modes related to AdBlue issues.
DPF removal prevents the ECU from triggering warning lights, limp mode, or regeneration cycles, as it will no longer detect the absence or malfunction of the DPF.
the EGR valve can be permanently closed, preventing exhaust gases from re-entering the intake manifold. The ECU is reprogrammed so it no longer expects or monitors the EGR function, avoiding error codes, warning lights, or limp modes that might otherwise occur.

Please note that the DPF, EGR and AdBlue solutions are created for off road use only.