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Generator Muffler For Honda GX340 GX390 Clone 420 459cc Predator 56170 Champion
$96.19
Sale price
$96.19
Regular price
Available to Order
This Generator Muffler is a replacement exhaust muffler compatible with Honda GX340, GX390, 420cc-459cc clone engines, Predator 56170, and Champion generators.
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I needed a forklift part and wasn’t sure which one fit. They asked for the model and serial number, got back to me quickly, and made sure I ordered the right one. Really helpful.
Randy W. — Verified customer
Product Overview
This Generator Muffler is a direct-fit exhaust silencer engineered for portable generators and equipment powered by 420cc–459cc clone engines. The heavy-duty Generator Muffler reduces operating noise without restricting exhaust flow, restoring proper sound suppression on Honda GX340/GX390-powered machines, Predator 56170, and Champion units. Designed as a straightforward bolt-on solution, this Generator Muffler replaces rusted, dented, or clogged original mufflers to keep your engine running smoothly.
Key Features & Performance
- Heavy-gauge steel shell withstands high exhaust temperatures and vibration
- Aluminized coating resists rust and corrosion for longer service life
- Direct bolt-on replacement — no cutting, welding, or fabrication required
- Internal multi-chamber baffles lower decibel levels without creating back-pressure
- Matches factory muffler dimensions and bolt-hole spacing for a precise fit
- Threaded outlet ready for spark arrestor or exhaust pipe attachment
Fitment & Compatibility
- Honda GX340 engine-equipped generators and equipment
- Honda GX390 engine-equipped generators and equipment
- 420cc, 440cc, and 459cc clone engines (Predator, DuroMax, and similar)
- Predator 56170 portable generator
- Champion portable generators with 389cc–459cc engines (select models)
Common Uses
- Replacing a rusted or damaged muffler on portable generators
- Quieting exhaust noise on pressure washers, water pumps, and log splitters
- Restoring correct exhaust routing for improved engine performance
- Maintaining generator readiness during camping, RV use, and power outages
- Preventative maintenance on job-site and standby power equipment
Technical Specifications
- Compatible Engine Displacement: 420cc – 459cc
- Compatible Engine Series: Honda GX340, GX390 and clone engines
- Compatible Models: Predator 56170, Champion generators (select models)
Frequently Asked Questions
Q: Will this muffler fit my Predator 420cc engine? A: Yes, this muffler is built for 420cc clone engines, including Predator 420cc models, provided the exhaust flange bolt pattern matches the GX390 layout. Always confirm your engine’s mounting holes before ordering.
Q: Does the muffler include mounting hardware? A: A pre-installed exhaust gasket is included. Mounting bolts are not supplied; reuse the existing hardware from your original muffler for a secure, leak-free installation.
Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.