Yeah, I was stunned when I cleaned mine out...seemed to go on forever!
You might do well to play the Doors' "Break On Through": the bass vibrations dislodge any remaining Jim Morrison's old beer cans. He was known to hide them in Mitsubishi engines.

You know the EGR is clogged
Carbon packed and dried.
Scrape and spray / pushed and pryed -
Break on through to the other side!
Break on through to the other side!
Break on through to the other side~