The Muffler,exhaust, cataloged under National Stock Number 2990-00-778-0031, 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 20 commercial cross-references from 10 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 | 2990-00-778-0031 |
| Primary Part Number | 3866266 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — No Item Name Available |
| Manufacturer | General Motors Llc Dba General Motors Llc |
| Status | CANCELLED |
| Design Type | DRY |
| Muffler Design | MULTIPASS |
| Tube Quantity | 3 |
| Coolant Type | AIR |
| Operating Position | HORIZONTAL |
| Outlet Inside Diameter | 1.688 INCHES NOMINAL FIRST OUTLET IN |
| Inlet Connection Type | UNTHREADED SINGLE INLET |
| Body Shape | OVAL |
| Inlet Outside Diameter | 2.125 INCHES NOMINAL SINGLE INLET IN |
| Inlet Location | LOCATED ON CENTER OF END SECTION |
| Inlet Projection Length | 2.000 INCHES NOMINAL SINGLE INLET IN |
| Surface Treatment | ZINC |
| Inlet Inside Diameter | 2.000 INCHES NOMINAL SINGLE INLET IN |
| Outlet Outside Diameter | 1.812 INCHES NOMINAL FIRST OUTLET IN |
| Outlet Projection Length | 2.000 INCHES NOMINAL FIRST OUTLET IN |
| Outlet Location | OFFSET ON END SECTION OPPOSITE INLET |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Connection Type | UNTHREADED FIRST OUTLET |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 3884816 | General Motors Corp Chevrolet Motor Div Special Products Dept (USA) |
| 3866266 PRIMARY | General Motors Llc Dba General Motors Llc (USA) |
| 3874660 | General Motors Corp Chevrolet Motor Div Special Products Dept (USA) |
| 749 | Ap Parts Co Industrial Sales Div (USA) |
| 3908390 | General Motors Corp Chevrolet Motor Div Special Products Dept (USA) |
| 3923366 PRIMARY | General Motors Llc Dba General Motors Llc (USA) |
| 3866266 | General Motors Corp Chevrolet Motor Div Special Products Dept (USA) |
| 3981942 | General Motors Corp Chevrolet Motor Div Special Products Dept (USA) |
| MUB19 | Mahle Aftermarket Inc. Dba Ae Clevite Inc (USA) |
| 3923366 | General Motors Corp Chevrolet Motor Div Special Products Dept (USA) |
| 3792269 | General Motors Corp Chevrolet Motor Div Special Products Dept (USA) |
| 8269 | Harvard Industries (USA) |
| 3923366 | General Motors Corp (USA) |
| 8876M | Hunter James Machine Co Inc (USA) |
| 1123 | Arvin Industries Inc (USA) |
| 1255 | Walker Mfg Co (USA) |
| 3831583 | General Motors Corp Chevrolet Motor Div Special Products Dept (USA) |
| 3908396 | General Motors Corp Chevrolet Motor Div Special Products Dept (USA) |
| CH53 | Maremont Corp (USA) |
| 21293 | Walker Mfg Co (USA) |
NSN 2990-00-778-0031 is a Muffler,exhaust, manufactured by General Motors Llc Dba General Motors Llc, classified under FSC 2990 (No Item Name Available). Status: cancelled.
NSN 2990-00-778-0031 has 20 cross-referenced part numbers: 3884816 (General Motors Corp Chevrolet Motor Div Special Products Dept), 3866266 (General Motors Llc Dba General Motors Llc), 3874660 (General Motors Corp Chevrolet Motor Div Special Products Dept), 749 (Ap Parts Co Industrial Sales Div), 3908390 (General Motors Corp Chevrolet Motor Div Special Products Dept) and 15 more.
There are 12 known substitutes for 2990-00-778-0031: 4820-00-036-0896, 5110-00-045-6207, 6625-00-063-0896 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 3866266: Design Type: DRY; Muffler Design: MULTIPASS; Tube Quantity: 3; Coolant Type: AIR. 21 total characteristics are documented in the Federal Logistics Information System.
NSN 2990-00-778-0031 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.