The Honda 18310-V09-A01 Muffler is a genuine OEM replacement built for HA4118 and HA4120 lawn tractors. As a direct OEM component, this muffler is the same part Honda installs at the factory, ensuring it matches the original mounting configuration and exhaust outlet dimensions without guesswork. Confirm your tractor's serial number against the fitment table before ordering, as Honda supersedes parts at serial breaks and the correct muffler varies by production range.
Key Features
- Genuine OEM Exhaust Quality — sourced directly from Honda, this muffler meets the same specifications as the original, maintaining proper back pressure and exhaust flow for the engine.
- Direct OEM Replacement — designed to fit the HA4118 and HA4120 lawn tractors, this part installs in place of the original with no reworking of the exhaust system.
- Serial Number Matters — Honda issues part supersessions at production breaks, so verify your tractor's serial number against the fitment table to confirm this is the correct muffler for your unit.
- Exhaust Integrity — a cracked or deteriorated muffler allows exhaust gases to escape before the outlet, increasing noise and reducing the engine's ability to run efficiently at its intended power output.
The muffler is the final stage of the exhaust system, receiving hot gases expelled from the engine's combustion chamber and reducing them to an acceptable sound level before they exit the machine. It is engineered to handle continuous heat cycling while maintaining a sealed flow path from the exhaust port to the atmosphere. When a muffler cracks, corrodes, or loses its seal, exhaust escapes prematurely — resulting in increased noise, rough running, and reduced engine efficiency that worsens the longer the problem goes unaddressed.
Part Details
| Part Number | 18310-V09-A01 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Muffler |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Lawn Tractor | HA4118, HA4120 | 6101761-9999999 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
