The Muffler,exhaust, cataloged under National Stock Number 2990-01-049-3978, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Walker Mfg Co. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 — Miscellaneous Engine Accessories, Nonaircraft (FSG 29) |
| Manufacturers | Walker Mfg Co (CAGE 79260); Military Vehicles Opn General Motors Truck and Bus Group Ms 2603-02 (CAGE 23862); General Motors Llc Dba General Motors Llc (CAGE 7X677); Cummins Filtration Inc. (CAGE 76700) |
| Parameter | Value |
|---|---|
| NSN | 2990-01-049-3978 |
| Primary Part Number | 22852 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Walker Mfg Co |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 22852 PRIMARY | Walker Mfg Co (USA) |
| 796790 | Military Vehicles Opn General Motors Truck and Bus Group Ms 2603-02 (USA) |
| 796790 PRIMARY | General Motors Llc Dba General Motors Llc (USA) |
| 86164M | Cummins Filtration Inc. (USA) |
| Reference | Meaning |
|---|---|
| 108030 | 5/2 Secondary reference U.S. Government activity |
| 796790 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
NSN 2990-01-049-3978 is a Muffler,exhaust, manufactured by Walker Mfg Co, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-049-3978 has 4 manufacturer part numbers on file: 22852 (Walker Mfg Co), 796790 (Military Vehicles Opn General Motors Truck and Bus Group Ms 2603-02), 796790 (General Motors Llc Dba General Motors Llc), 86164M (Cummins Filtration Inc.).
3 possible matches (shared part number, not a government interchangeability claim): 5310-01-264-6201, 6515-01-592-8603, 5331-01-681-4856. Verify interchangeability with system specifications before substitution.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.