The Honda 18310-Z8S-811 Muffler is a genuine OEM replacement built for GX240 and GX270 horizontal shaft engines. As a factory-sourced component, this muffler is manufactured to the same specifications as the original part, ensuring a direct, no-hassle swap on engines that need it. Confirm your engine's serial number against the fitment table before ordering, as Honda supersedes exhaust components at serial breaks across these series.
Key Features
- Genuine Honda OEM Exhaust — sourced directly from Honda, this muffler matches the original in port dimensions, mounting configuration, and exhaust flow characteristics for GX240 and GX270 engines.
- Direct Replacement Fit — designed to install in the stock location without modification, restoring the exhaust system to its original condition.
- Correct Engine Fitment — fits GX240 and GX270 horizontal shaft engines; verify your serial number against the compatibility table to confirm the right part for your build.
- Quieter, Cleaner Engine Operation — a sound, properly sealed muffler controls exhaust noise and directs hot gases safely away from the engine and operator; a cracked or failing muffler allows exhaust to escape before it is adequately attenuated.
The muffler is the endpoint of the exhaust system on a horizontal shaft engine. Combustion gases exit the cylinder through the exhaust port, travel through the exhaust pipe, and enter the muffler, where internal baffles reduce the pressure pulses responsible for engine noise before the gases are vented to atmosphere. When a muffler corrodes, cracks, or develops a failed sealing surface, exhaust escapes prematurely, resulting in noticeably louder operation, potential heat damage to surrounding components, and reduced back-pressure that can affect engine performance. Replacing a worn muffler with a genuine Honda part restores proper exhaust flow and brings noise levels back in line with the original design.
Part Details
| Part Number | 18310-Z8S-811 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Muffler |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX240, GX270 | All |
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.
