Exhaust System Component
The muffler is a major component within the exhaust muffler assembly. Its general function is to manage exhaust gases and reduce exhaust noise as gases pass through the exhaust system.
Honda · Genuine OEM Part
The Honda 18400-MKC-A00 is identified as a left exhaust muffler in Honda’s exhaust muffler parts catalog. It is the muffler assembly positioned on the left side of the exhaust system and is designed to receive and manage exhaust flow as part of that assembly.
Honda’s catalog identifies the component by its left-side exhaust location rather than publishing material, finish, dimensions, or other construction details. Catalog evidence also shows that Honda later designated part number 18400-MKC-A01 as the replacement for 18400-MKC-A00.
The muffler is a major component within the exhaust muffler assembly. Its general function is to manage exhaust gases and reduce exhaust noise as gases pass through the exhaust system.
Honda lists the component by the exact name MUFFLER, L. EX. The left-side designation is part of the catalog identity and helps distinguish this muffler from other exhaust components.
Honda dealer catalog data states that 18400-MKC-A01 replaces 18400-MKC-A00. That directional supersession record should be considered when ordering against the older Honda number.
| Honda Part Number | 18400-MKC-A00 |
|---|---|
| Honda Catalog Description | MUFFLER, L. EX. |
| Part Type | Muffler |
| Assembly | Exhaust Muffler |
| Position | Left |
| Superseded By | 18400-MKC-A01 |
| Model | Type | Model Years |
|---|---|---|
| GL1800 | Motorcycle | 2018–2023 |
| GL1800B | Motorcycle | 2018–2022 |
| GL1800BD | Motorcycle | 2018–2023 |
| GL1800D | Motorcycle | 2018–2023 |
| GL1800DA | Motorcycle | 2018–2023 |
Model applications as listed in Honda's dealer parts catalog for part number 18400-MKC-A00.
Verify the Honda OEM part number for your specific model before ordering.
Compatible motorcycles, ATVs & side-by-sides
Verify your vehicle's model, year and specific configuration before ordering.