OE 19166111 OE Replacement Air Filter.
For 2001, 2002, 2003, 2004, 2005 GM 6.6L Duramax LB7 LLY
Notice the glue lines on this filter. These are crucial in keeping the filters shape under the load of a diesel engine. If your filter does not have these reinforcement lines, it can get sucked into the turbo under extreme conditions.
The OEM filter was tested in an independent test against all of the leading replacement filters and it came out on top for filtration and air flow.