---
product_id: 621847062
title: "Generator Muffler Silencer for Honda & Clone Predator GX340 GX390 420cc 389cc 439cc 459cc Champion Duromax Firman Jiangdong"
brand: "mopasen"
price: "$100.16"
currency: USD
in_stock: true
reviews_count: 7
url: https://www.desertcart.us/products/621847062-generator-muffler-silencer-for-honda-and-clone-predator-gx340-gx390
store_origin: US
region: United States of America
---

# Ultra-quiet noise reduction Complete mounting kit included Precision fit for multiple engine models Generator Muffler Silencer for Honda & Clone Predator GX340 GX390 420cc 389cc 439cc 459cc Champion Duromax Firman Jiangdong

**Brand:** mopasen
**Price:** $100.16
**Availability:** ✅ In Stock

## Summary

> 🔇 Silence your generator, amplify your productivity!

## Quick Answers

- **What is this?** Generator Muffler Silencer for Honda & Clone Predator GX340 GX390 420cc 389cc 439cc 459cc Champion Duromax Firman Jiangdong by mopasen
- **How much does it cost?** $100.16 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/621847062-generator-muffler-silencer-for-honda-and-clone-predator-gx340-gx390)

## Best For

- mopasen enthusiasts

## Why This Product

- Trusted mopasen brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durable Build:** Crafted by MOPASEN for long-lasting performance under heavy generator use.
- • **Universal Compatibility:** Fits Honda GX340/GX390 and popular clone engines from 337cc to 459cc effortlessly.
- • **Whisper-Quiet Operation:** Slash noise pollution with advanced muffler design for peaceful workspaces.
- • **Plug & Play Installation:** Comes with gasket and nuts for hassle-free, professional-grade mounting.
- • **Boost Your Generator’s Efficiency:** Optimized exhaust flow enhances engine performance and longevity.

## Overview

This MOPASEN Generator Muffler Silencer is engineered for Honda GX340/GX390 and a wide range of clone engines (337cc-459cc). It reduces noise dramatically while improving exhaust efficiency. The package includes a mounting gasket and nuts for easy installation, making it the perfect upgrade for professional-grade generators from Champion, Duromax, Firman, and more.

## Description

Generator Muffler Silencer for Honda & Clone Predator GX340 GX390 420cc 389cc 439cc 459cc Champion Duromax Firman Jiangdong

## Features

- For many clone 440cc 337cc 338 389 420 439 459 cc engine powered Durostar Centurion Champion All Power Duromax DuroStar Sigma Gentron Etq Wen Westinghouse UST All Power Powerhorse Powermax etc. Generators.
- For CHAMPION generator 6500/7800 CSA40017 Predator 56170 63085 66604 69671 63086 56171.
- For some Honda GX 340 390 11hp 13hp generator muffler replacement, also for the clones.
- There are different type of mufflers for Honda clones, please check the product images carefully before ordering.
- Comes in a Muffer with a mounting gasket and nuts.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | MOPASEN |
| Brand | MOPASEN |
| Model | XYQGX390LK |
| Item Weight | 4.73 pounds |
| Product Dimensions | 4 x 4 x 4 inches |
| Item model number | XYQGX390LK |
| Exterior | / |
| Manufacturer Part Number | XYQGX390LK |

## Product Details

- **Brand:** MOPASEN
- **Item dimensions L x W x H:** 4 x 4 x 4 inches
- **Vehicle Service Type:** /
- **UPC:** 760754630853
- **Manufacturer:** MOPASEN

## Images

![Generator Muffler Silencer for Honda & Clone Predator GX340 GX390 420cc 389cc 439cc 459cc Champion Duromax Firman Jiangdong - Image 1](https://m.media-amazon.com/images/I/51FaiXEUKPL.jpg)
![Generator Muffler Silencer for Honda & Clone Predator GX340 GX390 420cc 389cc 439cc 459cc Champion Duromax Firman Jiangdong - Image 2](https://m.media-amazon.com/images/I/51ZsseqDpwL.jpg)
![Generator Muffler Silencer for Honda & Clone Predator GX340 GX390 420cc 389cc 439cc 459cc Champion Duromax Firman Jiangdong - Image 3](https://m.media-amazon.com/images/I/51Q0QipFGQL.jpg)
![Generator Muffler Silencer for Honda & Clone Predator GX340 GX390 420cc 389cc 439cc 459cc Champion Duromax Firman Jiangdong - Image 4](https://m.media-amazon.com/images/I/511uTkWLImL.jpg)
![Generator Muffler Silencer for Honda & Clone Predator GX340 GX390 420cc 389cc 439cc 459cc Champion Duromax Firman Jiangdong - Image 5](https://m.media-amazon.com/images/I/5128smzg9YL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ great item
*by D***E on July 9, 2025*

great item

### ⭐⭐ Doesn't flow enough for a 400cc
*by M***G on March 8, 2025*

Seems well built but it definitely doesn't flow enough for a 398cc engine i was trying to use it on.

### ⭐ A lot of modifications required to use
*by G***  on November 22, 2024*

This muffler requires a lot of modification to work on the generator that they are selling it for. Bolt holes don’t line up at all, It is Louder than the old stock muffler.

## Frequently Bought Together

- MOPASEN Generator Muffler Silencer for Honda & Clone Predator GX340 GX390 420cc 389cc 439cc 459cc Champion Duromax Firman Jiangdong
- YAMAKATO 420cc GX390 GX340 Carburetor Gasket Kit Set for Honda and Clones 389cc 439cc 459cc 338cc 13hp 11hp Engines & Generators Predator Champion Generac 0G84420156 6500 9000 8750 9500 OEM 5 Packs
- Honda 16100-Z5T-901 Carburetor

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-22*