The Pipe,exhaust, cataloged under National Stock Number 2990-01-264-4053, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Walker Mfg Co. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-264-4053 |
| Primary Part Number | 45766 |
| Item Name | Pipe,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Walker Mfg Co |
| Status | ACTIVE |
| Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 45766 PRIMARY | Walker Mfg Co (USA) |
| 14034824 PRIMARY | General Motors Llc Dba General Motors Llc (USA) |
| Reference | Meaning |
|---|---|
| 14016470 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
| 14034824 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
| T4-4100 | 5/9 Secondary reference Maremont Corp Exhaust Systems Div |
NSN 2990-01-264-4053 is a Pipe,exhaust, manufactured by Walker Mfg Co, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-264-4053 has 2 manufacturer part numbers on file: 45766 (Walker Mfg Co), 14034824 (General Motors Llc Dba General Motors Llc).
2 possible matches (shared part number, not a government interchangeability claim): 6625-01-302-0756, 4810-01-460-3378. Verify interchangeability with system specifications before substitution.
Key specifications for 45766: Special Features: 2.000 IN. ID INLET W/SPOUT OUTLET; 55.500 IN. O/A LG; LEFT SIDE OF DUAL OUTSET MUFFLER IN; End Item Identification: 1980-85 CHEVROLET AND GMC TRUCK W/304 AND 350 ENGINES,117.5 AND 131.5; Material: STEEL. 1 specification is documented in the U.S. Government catalog.
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.