Description
Engineered for the heavy-duty Honda GX340 (337cc) engine, this Multi-Layer Steel (MLS) head gasket is the premium choice for high-output pressure washers and industrial machinery. When your equipment is running at maximum throttle to maintain high PSI, this gasket provides the critical seal needed to prevent power loss and engine damage.
Key Features
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High-Performance Steel Construction: Designed to survive the intense combustion pressures of the 11.0 HP GX340. Unlike standard gaskets, this metal version won’t crack or shrink under extreme thermal stress.
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Superior Sealing Technology: Features an integrated embossed sealing ring that bites into the head and block surfaces, ensuring a leak-proof seal for oil and compression.
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Maximum Durability: Resistant to “fretting” (surface wear caused by vibration), making it ideal for engines mounted on pressure washer frames that experience constant movement.
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OEM Grade Precision: Tailored specifically for the 82mm bore of the GX340, ensuring no obstruction of the valves or cooling paths.
Technical Specifications
| Feature | Specification |
| Engine Model | Honda GX340 (11.0 HP) |
| Material | Multi-Layer Steel (MLS) |
| Bore Diameter | 82mm |
| Engine Type | 337cc 4-Stroke OHV |
| Common Equipment | Commercial Pressure Washers, Floor Buffers, Chipper Shredders |
Why Professionals Upgrade to Metal
The GX340 is often used in professional environments where “downtime” equals lost revenue. Switching to a metal gasket offers:
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Elimination of Blowouts: Metal gaskets are significantly more resistant to the high-pressure “blow-by” that often destroys composite gaskets during long work shifts.
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Stable Compression: Maintains a consistent thickness, ensuring your engine’s timing and compression ratios stay exactly where they were designed to be.
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Chemical & Fuel Resilience: Impervious to modern fuel additives and aggressive cleaning chemicals that can soften or degrade fiber-based gaskets.





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