Description
Overview:
This Exhaust/Muffler Complete is a genuine Honda replacement for small petrol engines, built to restore correct exhaust performance and noise control. Made from robust, painted steel with a corrosion-resistant finish, it is engineered to withstand high temperatures and regular site use. The unit reduces engine noise and safely directs exhaust gases away from the engine and operator, helping maintain smooth running and dependable power. Designed specifically for Honda GX120 and GX160 engines, it offers correct fit and function without modification, making it suitable for a wide range of compact machinery powered by these models. Genuine Honda quality and the correct back-pressure characteristics help protect engine longevity and maintain efficiency. Honda part number 18310-Z4M-811.
Key Features:
- Genuine Honda part for assured compatibility and performance on GX120 and GX160 engines
- Durable steel construction with heat-resistant coating for long service life
- Optimised flow to manage back pressure, supporting reliable starting and smooth running
- Effective noise reduction for quieter operation on site or at home
- Direct bolt-on replacement using existing engine fixings for straightforward fitting
- Corrosion-resistant finish suited to outdoor and workshop environments
- Compact, box-style design maintains clearance around the engine and frame
- Built to OEM standards to help protect engine efficiency and fuel economy
Typical Applications:
Used on generators, water pumps, plate compactors, concrete mixers, tillers, and pressure washers fitted with Honda GX120 or GX160 engines. Ideal as a like-for-like replacement where the original muffler has corroded, become noisy, or been damaged. Suitable for routine maintenance or refurbishment to keep equipment compliant with noise expectations and running reliably.
Also known as:
Silencer, exhaust silencer, muffler assembly, exhaust box, exhaust canister, exhaust outlet, noise suppressor, engine exhaust. Common terms vary by industry, but all refer to the same component that quietens exhaust noise and channels gases away from the engine.
Fits Models:
GX120, GX120T2, GX120UT2, GX160, GX160T2, GX160UT2
Alternate Part Numbers:
18310-Z4M-811, 18310Z4M811
Product Specifications
| L&S Part No. | 18310 Z4M 811 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Honda |
| OEM No. | 18310Z4M811 |
| Unit of Sale | 1 |
| Applications | GX120, GX120T2, GX120UT2, GX160, GX160T2, GX160UT2 |
| Machine Type | Engines |
| Fits Brands | Honda |
| Fits Models | GX120UT2 (GCBMT) | GX120T2 (GCBNT) | GX160UT2 (GCBPT) | GX160T2 (GCBRT) |



