The Honda 18215-ZA0-800 Exhaust Gasket is a genuine OEM replacement designed for GX360 horizontal shaft engines and Honda H4013, H4514, H4518, HT3813, and HT4213 lawn tractors. As a direct OEM replacement, this gasket is manufactured to Honda's own specifications, ensuring the sealing surface geometry and material grade match what left the factory. Always confirm your machine's serial number against the fitment table before ordering, as Honda supersedes parts at production breaks and the correct gasket for your unit may vary by serial range.
Key Features
- OEM Exhaust Sealing — engineered to Honda's exact sealing profile for the exhaust port, preventing combustion gases from bypassing the joint between the exhaust system and the cylinder head
- Direct OEM Replacement — sourced from Honda and identified by part number 18215-ZA0-800, this gasket installs without modification on the covered models
- Broad Fitment — covers GX360 horizontal shaft engines as well as H4013, H4514, H4518, HT3813, and HT4213 lawn tractors; check your serial number against the fitment table to confirm the correct application
- Exhaust Integrity — a failed or degraded exhaust gasket allows hot exhaust gases to escape at the cylinder head joint, producing noise, sooty deposits, and potential heat damage to surrounding components
The exhaust gasket forms a gas-tight seal between the exhaust port on the cylinder head and the exhaust pipe or manifold. Its job is to contain the high-temperature, high-pressure combustion gases leaving the engine and direct them through the exhaust system rather than allowing them to leak into the surrounding area. When this gasket deteriorates or burns through, the resulting exhaust leak causes an audible ticking or hissing at the head, reduces back-pressure in the exhaust circuit, and can scorch nearby components over time. Replacing it with a genuine Honda part restores the original sealing surface and brings exhaust flow back to specification.
Part Details
| Part Number | 18215-ZA0-800 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Exhaust Gasket |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX360 | All |
| Lawn Tractor | H4013, H4514, H4518, HT3813, HT4213 | 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.
