Generator Muffler For Honda GX340 GX390 Clone 420 459cc Predator 56170 Champion

This Generator Muffler is a replacement exhaust muffler compatible with Honda GX340, GX390, 420cc-459cc clone engines, Predator 56170, and Champion generators.

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.