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

3.0/5
Product ID: 621847062
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Details

  • Brand
    MOPASEN
  • Item dimensions L x W x H
    4 x 4 x 4
  • Vehicle Service Type
    /
  • UPC
    760754630853
  • Manufacturer
    MOPASEN
🔇Ultra-quiet noise reduction
🔧Complete mounting kit included
⚙️Precision fit for multiple engine models

Description

🔇 Silence your generator, amplify your productivity!

  • 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 GENERATORS EFFICIENCY - Optimized exhaust flow enhances engine performance and longevity.

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.

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Specifications

ManufacturerMOPASEN
BrandMOPASEN
ModelXYQGX390LK
Item Weight4.73 pounds
Product Dimensions4 x 4 x 4 inches
Item model numberXYQGX390LK
Exterior/
Manufacturer Part NumberXYQGX390LK

Reviews

3.0

All from verified purchases

D**E

great item

great item

M**G

Doesn't flow enough for a 400cc

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

G**

A lot of modifications required to use

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.

L**R

fits gx270

Quieter than stock muffler. Fits well with fabricated mount.

S**S

Fits and Works Well

Fits our generator perfectlyMakes it so much quieterBe the hero of the neighborhood with a quiet electricity makerEasy to install

D**.

Fitment issues

The muffler is about 3/16 " shorter than the original. The side bracket on the muffler does not reach the proper location for the bracket. I had to use some slotted angle steel to fabricate a different bracket to secure the side of the muffler to the body of the generator. My generator is a Predator Model 68530.

L**.

Nice addition to our generator….

During a recent storm, we lost power for over a week and had to run our generator constantly. I got this muffler to hopefully quiet the noise from the generator. I did not want to mount the muffler directly to the generator, instead I wanted to mount it in series with the existing muffler. The muffler came with a flange gasket and mounting nuts. I purchased a floor flange, flexible tubing and fittings and built a 6’ stand, then mounted the second muffler on top. By doing this, it allowed me to reduce both the heat and noise from the generator and direct the exhaust noise and fumes away from the house. Before connecting the muffler, I registered 89 decibels on my dB meter from 20’ away. After installing the additional muffler, the reading went down to 77 decibels.

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Pooja R.

The customer service exceeded my expectations. Perfect for buying products you can't find elsewhere.

1 week ago

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Currently out of stock

Perustore

Sorry, this item from our Peru store is out of stock. We're restocking soon—check back or contact support for similar products.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

Generator Muffler Silencer For Honda And Clone Predator Gx340 Gx390 | Desertcart Peru