The Honda 18321-ZJ1-841 Left Muffler Protector (Side) is a genuine OEM component designed for GCV520, GCV530, GXV520, GXV530, GXV610, GXV620 vertical shaft engines and GX610 and GX620 horizontal shaft engines. As a direct Honda OEM part, it is produced to the same specifications as the original fitted at the factory, ensuring a proper match to the exhaust system on your machine. Verify your engine's serial number against the fitment table before ordering, as Honda supersedes parts at production breaks and the correct part number 18321-ZJ1-841 may vary by serial range.
Key Features
- Genuine OEM Heat Shield — manufactured by Honda to match the original protector's coverage area and mounting geometry, so there is no guesswork about how it sits against the muffler housing
- Left Side Coverage — this is the left-side protector; confirm your engine's muffler configuration before ordering to ensure you are selecting the correct shield for your unit
- Broad Engine Compatibility — fits GCV520, GCV530, GXV520, GXV530, GXV610, and GXV620 vertical shaft engines, as well as GX610 and GX620 horizontal shaft engines, including both the 520 cc and 610–620 cc displacement families
- Serial Number Match Recommended — Honda updates part numbers at serial breaks, so cross-check your engine's serial number against the compatibility table to confirm this protector is the right fit for your specific production run
- Burn and Contact Protection — a properly fitted muffler protector shields adjacent components and operator contact points from exhaust heat; a cracked or missing protector leaves those areas exposed during operation
The muffler protector is a heat shield fitted over the exhaust muffler on Honda engines. Its role is to reduce surface temperatures on the outer face of the muffler, protecting nearby components, wiring, and fuel lines from radiant heat, and reducing the risk of contact burns during and after operation. When the protector cracks, warps, or goes missing, the muffler's exterior surface is left fully exposed, which can accelerate wear on surrounding parts and create a burn hazard for anyone working near or servicing the engine.
Part Details
| Part Number | 18321-ZJ1-841 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Left Muffler Protector (Side) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX610, GX620 | All |
| Vertical Shaft Engine | GCV520, GCV530, GXV520, GXV530, GXV610, GXV620 | 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.
