The Honda 18310-Z4M-T31 Muffler (Sakai-Arrester) is a genuine OEM exhaust muffler designed for GX160 horizontal shaft engines. As a direct Honda OEM part, it is manufactured to the same specification as the original component and is a confirmed fitment for the GX160. Honda supersedes parts at serial breaks, so buyers should verify their engine serial number against the fitment table before ordering to confirm this is the correct assembly for their unit.
Key Features
- Genuine Honda OEM Construction — sourced directly from Honda, this muffler meets the same exhaust flow and back-pressure requirements as the original, preserving engine output and throttle response on the GX160.
- Integrated Spark Arrester — the Sakai-arrester design incorporates a spark-arresting screen within the muffler body, capturing exhaust sparks before they exit — an important consideration when operating in dry or vegetation-heavy environments.
- Direct-Fit Replacement — engineered to the original mounting pattern and port dimensions for the GX160, this muffler installs without cutting or adapting exhaust hardware.
- Serial Number Verification Recommended — Honda issues multiple muffler variants across GX160 production runs; confirm your engine serial number against the fitment data to ensure this is the correct assembly for your unit.
A muffler reduces the noise and pressure of exhaust gases leaving the engine after combustion, channeling them through an internal baffle or chamber before releasing them to atmosphere. On the GX160, a correctly functioning muffler keeps exhaust noise within an acceptable range and maintains the back-pressure balance the engine needs to run efficiently. The Sakai-arrester variant adds an internal spark-arresting screen to the muffler assembly; when this screen becomes blocked with carbon deposits or the muffler cracks or corrodes through, exhaust restriction increases, the engine loses power and runs hot, and — in the arrester's case — the ability to contain exhaust sparks is compromised. Replacing a worn or damaged unit with the correct OEM assembly restores proper exhaust flow and spark containment for the equipment it powers.
Part Details
| Part Number | 18310-Z4M-T31 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Muffler (Sakai-Arrester) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX160 | 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.
