The Honda 18310-Z8T-800 Muffler is a genuine OEM replacement designed for GX340 horizontal shaft engines. As a direct Honda OEM part, it is manufactured to the same specifications as the original component, ensuring a proper fit and correct exhaust routing without modification. This muffler is the right choice when the original has cracked, corroded, or burned through, and the engine needs its exhaust system restored to proper working condition. Confirm your engine's serial number against the fitment table before ordering, as Honda updates parts at serial breaks.
Key Features
- Genuine Honda OEM — sourced directly from Honda, this muffler matches the original part in every dimension, ensuring correct exhaust flow and a secure, leak-free fit on the GX340 engine.
- Exact Replacement Fit — replaces part number 18310-Z8T-800 on GX340 horizontal shaft engines with no cutting, welding, or adaptation required.
- Restored Exhaust Performance — a failed or damaged muffler allows uncontrolled exhaust noise and backpressure loss; this replacement brings exhaust output back to the engine's original operating condition.
- Serial Number Verification Recommended — Honda supersedes exhaust components at production serial breaks, so check your GX340 serial number against the compatibility table to confirm this is the correct part for your unit.
The muffler is the final stage of a small engine's exhaust system. Hot combustion gases exit the cylinder head through the exhaust port, pass through the muffler's internal chambers, and are cooled and silenced before being released into the atmosphere. This process reduces exhaust noise to an acceptable operating level while allowing the engine to expel spent gases efficiently. When a muffler cracks, rusts through, or becomes blocked, the engine loses back-pressure balance, exhaust noise increases sharply, and in some cases power output drops — making timely replacement essential for normal engine operation.
Part Details
| Part Number | 18310-Z8T-800 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Muffler |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX340 | 1016322-9999999 |
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.
