The Muffler,exhaust, cataloged under National Stock Number 2990-00-991-3657, is classified within Federal Supply Class 2990 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is General Motors Llc Dba General Motors Llc. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 11 commercial cross-references from 8 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 2990-00-991-3657 |
| Primary Part Number | 3816360 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — No Item Name Available |
| Manufacturer | General Motors Llc Dba General Motors Llc |
| Status | CANCELLED |
| Operating Position | HORIZONTAL |
| Outlet Inside Diameter | 1.687 INCHES NOMINAL FIRST OUTLET IN |
| Design Type | DRY |
| Inlet Connection Type | UNTHREADED SINGLE INLET |
| Coolant Type | AIR |
| Muffler Design | STRAIGHT THROUGH |
| Inlet Projection Length | 2.250 INCHES NOMINAL SINGLE INLET IN |
| Outlet Projection Length | 2.250 INCHES NOMINAL FIRST OUTLET IN |
| Body Shape | ROUND |
| Inlet Inside Diameter | 2.000 INCHES NOMINAL SINGLE INLET IN |
| Outlet Connection Type | UNTHREADED FIRST OUTLET |
| Overall Diameter | 5.000 INCHES NOMINAL IN |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| Surface Treatment | ZINC |
| Inlet Location | LOCATED IN CENTER OF END SECTION |
| Outlet Location | LOCATED IN CENTER OF END SECTION OPPOSITE INLET |
| Outlet Outside Diameter | 1.812 INCHES NOMINAL FIRST OUTLET IN |
| Inlet Outside Diameter | 2.125 INCHES NOMINAL SINGLE INLET IN |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 3816360 | Clark Radio Equipment Co (USA) |
| 3865285 | General Motors Corp (USA) |
| 3865285 | Truck and Bus Group Flint Truck Assembly Plant (USA) |
| 3981940 | General Motors Corp Chevrolet Motor Div Special Products Dept (USA) |
| 3865285 | General Motors Corp Chevrolet Motor Div Special Products Dept (USA) |
| 3816360 PRIMARY | General Motors Llc Dba General Motors Llc (USA) |
| 3816360 | General Motors Corp Chevrolet Motor Div Special Products Dept (USA) |
| 101901 PRIMARY | Arvin Industries Inc (USA) |
| 3816360 | General Motors Corp (USA) |
| 21028 | Walker Mfg Co (USA) |
| 710 | Harvard Industries (USA) |
NSN 2990-00-991-3657 is a Muffler,exhaust, manufactured by General Motors Llc Dba General Motors Llc, classified under FSC 2990 (No Item Name Available). Status: cancelled.
NSN 2990-00-991-3657 has 11 cross-referenced part numbers: 3816360 (Clark Radio Equipment Co), 3865285 (General Motors Corp), 3865285 (Truck and Bus Group Flint Truck Assembly Plant), 3981940 (General Motors Corp Chevrolet Motor Div Special Products Dept), 3865285 (General Motors Corp Chevrolet Motor Div Special Products Dept) and 6 more.
There are 12 known substitutes for 2990-00-991-3657: 5355-00-045-5251, 5360-00-229-2871, 4810-00-237-0268 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 3816360: Operating Position: HORIZONTAL; Outlet Inside Diameter: 1.687 INCHES NOMINAL FIRST OUTLET IN; Design Type: DRY; Inlet Connection Type: UNTHREADED SINGLE INLET. 19 total characteristics are documented in the Federal Logistics Information System.
NSN 2990-00-991-3657 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.