The Muffler,exhaust, cataloged under National Stock Number 2990-00-654-8148, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Volvo Trucks North America, Inc. Dba (foreign Parent Is Volvo Lastvagnar Ab, Goteborg, Sweden.). Government technical data includes 20 specifications, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 2990-00-654-8148 |
| Primary Part Number | 7WA510 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Volvo Trucks North America, Inc. Dba (foreign Parent Is Volvo Lastvagnar Ab, Goteborg, Sweden.) |
| Status | ACTIVE |
| Operating Position | HORIZONTAL |
| FSC Application Data | GASOLINE ENGINE,NONAIRCRAFT |
| Inlet Outside Diameter | 2.3506 INCHES MINIMUM AND 2.3556 INCHES MAXIMUM SINGLE INLET IN |
| Inlet Location | 1-9/16 IN. C TO CO AND 30 DEG BELOW HORIZONTAL CENTERLINE IN |
| Coolant Type | AIR |
| Design Type | JACKETED |
| Overall Diameter | 6.000 INCHES NOMINAL IN |
| Outlet Inside Diameter | 2.505 INCHES MINIMUM AND 2.510 INCHES MAXIMUM FIRST OUTLET IN |
| Inlet Projection Length | 1.250 INCHES NOMINAL SINGLE INLET IN |
| Muffler Design | MULTIPASS |
| Outlet Outside Diameter | 2.600 INCHES MINIMUM AND 2.605 INCHES MAXIMUM FIRST OUTLET IN |
| Tube Quantity | 2 |
| Inlet Connection Type | UNTHREADED SINGLE INLET |
| Body Shape | ROUND |
| Outlet Integral Tail Pipe Length | 15.750 INCHES NOMINAL FIRST OUTLET IN |
| Inlet Inside Diameter | 2.255 INCHES MINIMUM AND 2.260 INCHES MAXIMUM SINGLE INLET IN |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Projection Length | 1.250 INCHES NOMINAL FIRST OUTLET IN |
| Outlet Connection Type | UNTHREADED FIRST OUTLET |
| Outlet Location | 1-9/16 IN. C TO C AND 90 DEG ABOVE HORIZONTAL CENTERLINE IN |
| 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 |
|---|---|
| 7WA510 PRIMARY | Volvo Trucks North America, Inc. Dba (foreign Parent Is Volvo Lastvagnar Ab, Goteborg, Sweden.) (USA) |
| 6548148 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| N2470 | 5/9 Secondary reference Diamond Reo Truck Co |
| 380005 | 5/9 Secondary reference White Motor Corp |
NSN 2990-00-654-8148 is a Muffler,exhaust, manufactured by Volvo Trucks North America, Inc. Dba (foreign Parent Is Volvo Lastvagnar Ab, Goteborg, Sweden.), classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-00-654-8148 has 2 manufacturer part numbers on file: 7WA510 (Volvo Trucks North America, Inc. Dba (foreign Parent Is Volvo Lastvagnar Ab, Goteborg, Sweden.)), 6548148 (U S Army Tank Automotive Command Amsta-Im-Mm).
2 possible matches (shared part number, not a government interchangeability claim): 3110-00-858-2670, 4720-01-331-3029. Verify interchangeability with system specifications before substitution.
Key specifications for 7WA510: Operating Position: HORIZONTAL; FSC Application Data: GASOLINE ENGINE,NONAIRCRAFT; Inlet Outside Diameter: 2.3506 INCHES MINIMUM AND 2.3556 INCHES MAXIMUM SINGLE INLET IN; Inlet Location: 1-9/16 IN. C TO CO AND 30 DEG BELOW HORIZONTAL CENTERLINE IN. 20 specifications are 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.