The Muffler,exhaust, cataloged under National Stock Number 2990-01-099-0747, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Brp Us Inc. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-099-0747 |
| Primary Part Number | 391188 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Brp Us Inc |
| Status | ACTIVE |
| Operating Position | VERTICAL |
| Inlet Outside Diameter | 3.000 INCHES NOMINAL SINGLE INLET IN |
| Inlet Location | TOP END OF BODYL |
| Coolant Type | WATER |
| Design Type | WET |
| Overall Diameter | 3.000 INCHES NOMINAL IN |
| Inlet Projection Length | 0.250 INCHES NOMINAL SINGLE INLET IN |
| Baffle Quantity | 6 |
| Muffler Design | BAFFLE |
| Inlet Connection Type | UNTHREADED SINGLE INLET |
| Body Shape | ROUND |
| Nonconnection Outlet Location | SIDE SECTION OF BODY AT BOTTOM |
| Nonconnection Outlet Type and Quantity | 1 SLOTTED |
| Nonconnection Outlet Size | 0.335 IN. W; 2.750 IN. LG IN |
| Surface Treatment | ANODIZE |
| Inlet Inside Diameter | 2.750 INCHES NOMINAL SINGLE INLET IN |
| Material | ALUMINUM ALLOY LOCATION NOT OTHERWISE SPECIFIED |
| 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 |
|---|---|
| 391188 | Brp Us Inc (USA) |
| Reference | Meaning |
|---|---|
| 391188 | 3/9 Design control — primary reference U.S. Government activity |
| 391188 | 5/9 Secondary reference Evinrude Motors Product Group of Outboard Marine Corp |
| 391188 | 5/9 Secondary reference Outboard Marine Corp Johnson Motors Div |
NSN 2990-01-099-0747 is a Muffler,exhaust, manufactured by Brp Us Inc, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-099-0747 has 1 manufacturer part number on file: 391188 (Brp Us Inc).
Key specifications for 391188: Operating Position: VERTICAL; Inlet Outside Diameter: 3.000 INCHES NOMINAL SINGLE INLET IN; Inlet Location: TOP END OF BODYL; Coolant Type: WATER. 17 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.