High-pressure water wash the filter thoroughly. Visually inspect the filter for residual conglomerate particulate matter. Bake in a kiln for 6 to 8 hours at specified temperatures. Vacuum or blow out the filter to remove the residual ash. Visually inspect the filter to ensure all particulate matter has been removed.
By deleting the EGR, you can improve the airflow in your engine and increase power by around 1%. The second reason is to maximize engine life. The third is to improve fuel efficiency. In addition to the mentioned advantages, deleting the DPF will reduce the amount of soot and other pollutants that may block the outflow of air from your engineHaving a manual regen or two done first might help get the thing really clean. Eventually the DPF will become clogged enough that you'll have to take it somewhere to have the DPF removed (or remove it yourself) and take it to a facility that can re-condition it/manually clean it.