It shouldn't be too difficult to bolt that system on, provided you have the equipment and tools. A few fixings are difficult to access.
The reason why DPF's and EGR's are removed in competition is that they would inhibit tuning of the engine elsewhere. It allows maximum efficiency in the new ECU map programming, whilst exploiting each component's capabilities safely (turbo, injectors, sensor parameters etc etc...). If the EGR and DPF were still present, they would not allow these top parameters to be met.
So, it all comes down to the map, and who does it. You could see massive gains in HP. But removing either is no good without a map to exploit it.
Re. EGR: of course, no one really wants to pour carbon-loaded exhaust gas back into the air intake, but I must mention - *nissan-navara.net, and it's staff, do not recommend the removal of, or tampering with any such emission control device on any road going vehicle. Remember to check local laws*
Na, don't do that yourself, best take it to the garage.
Last edited by mrw27; 15-04-19 at 05:27 PM.