What in the world is this?

[dw2000ta]

09 t660 cm871. Recently deleted and retuned by the man himself. Pulled a load up to West Virginia and noticed this odd sound coming through the intake. Truck was rolling coal past 1/4 throttle input.This is what I've checked and replaced so far

Full injector leak down test. #1 injector failed.. Replaced with RX injector from Cummins.

Checked static cam timing with wedges.. ok
Checked hot and cold side of turbo for leaks.. Ok and dry.
Complete overhead adjustment.
Air filter is good
Has plenty of power but rolls black smoke past a certain throttle input.

Any ideas or input is greatly appreciated.