The Honda 18310-Z8T-801 Muffler is a genuine OEM replacement designed for GX340 horizontal shaft engines. As a direct Honda OEM component, this muffler is manufactured to the same specification as the part that left the factory, ensuring proper exhaust routing and sound attenuation without modification. If your GX340 engine is running louder than normal or showing signs of exhaust damage, replacing the muffler with part number 18310-Z8T-801 restores proper operation and keeps the engine running as intended.
Key Features
- Genuine Honda OEM — sourced directly from Honda, this muffler matches the original in every dimension and exhaust flow characteristic, so there is no guesswork on fit or performance.
- Correct Exhaust Backpressure — a properly functioning muffler maintains the exhaust backpressure profile the GX340 engine was tuned for, supporting consistent power output across the operating range.
- GX340 Fitment — built specifically for the GX340 horizontal shaft engine; verify your engine's serial number against the fitment table to confirm this is the right muffler for your serial range.
- Replaces a Failed or Damaged Muffler — a cracked, rusted-through, or perforated muffler increases exhaust noise significantly and can redirect hot gases toward surrounding components; this replacement corrects both issues.
The muffler receives hot exhaust gases from the engine's exhaust port and routes them through a series of internal chambers that reduce noise before releasing them to atmosphere. On a GX340 horizontal shaft engine, the muffler also plays a role in managing exhaust flow resistance, which affects how cleanly the engine breathes and, in turn, how consistently it delivers power to the equipment it drives. When the muffler cracks or corrodes through, exhaust noise climbs sharply, and heat can be directed toward areas not designed to handle it — making timely replacement the straightforward fix.
Part Details
| Part Number | 18310-Z8T-801 |
|---|---|
| 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.
