The easiest and simplest way to reduce the noise of a generator is to install a muffler.
Here are the quietest mufflers for generator you can buy in 2025:
- Heat Tolerant (Quiet Muffler For Generator): Cummins Onan Muffler
- Corrosion Resistant (Quiet Muffler For Generator): Walker Exhaust Muffler
- Easy to install (Quiet Muffler For Generator): New Stens Muffler
- Smaller inlet (Quiet Muffler For Generator): Maxpower Cylinder Muffler
| 4 Quietest Mufflers For Generator | ||
|---|---|---|
Heat Tolerant | Cummins Onan Muffler
| |
Corrosion Resistant | Walker Exhaust Muffler
| |
Easy to install | New Stens Muffler
| |
Smaller inlet | Maxpower Cylinder Muffler
| |
Heat Tolerant (Quiet Muffler For Generator): Cummins Onan Muffler
- Withstands high temperature
- Heavy duty and Durable
- Super quiet
- Easy to install
- The moisture drain plug is quite small
Cummins Onan Muffler is made of thin metal, which is a good choice for big generators. It withstands a very high temperature, which is also pretty heavy-duty and durable. This muffler does a super good job of holding down the sound.
Cummins Onan Muffler is a straight out exhaust, which exhausts out faster so that the new fuel comes in faster and the engine goes faster, adding more power to your generator. Besides, It is pretty easy to install with a 1 1/2-inch inlet. If your generator is smaller than this, you can buy a reducing adapter.
The only drawback of this muffler is that the moisture drain plug is quite small, which is pretty hard to remove.
| Cummins Onan Muffler Specifications | |
|---|---|
Weight | 5.9 pounds |
Dimension | 22.6 x 8.9 x 7.3 inches |
Highlight Features | 1 1/2-inch inlet; Straight out exhaust |
Cummins Onan Muffler is a good choice for big generators, which is heavy-duty and quiet.
Corrosion Resistant (Quiet Muffler For Generator): Walker Exhaust Muffler
- Corrosion-resistant stainless steel
- OE-style louvered tubes & OE-style domed heads
- Internal parts allow expansion
- Easy to install
- Compact & Affordable
- Not as quiet as the Cummins Onan Muffler
Walker Exhaust Muffler is a compact, expandable, and super durable muffler for generators. It is equipped with corrosion-resistant stainless steel heads, shell, bushings, louvered tubes, and partitions, which you can be confident about its durability and toughness. Moreover, the OE-style louvered tubes and the OE-style domed heads help reduce the noise better than straight perforated tubes. This muffler is carefully tested for reliable acoustic and flow.
Walker Exhaust Muffler has internal parts that expand when the temperature changes, ensuring minimum distortion. The structure of this muffler is also designed to remain stable in any case. Besides, this muffler is pretty easy to install, compact, and affordable.
You can upgrade this muffler to a full exhaust system, which significantly pushes the fuel efficiency and environment-friendliness. However, in terms of quietness, I still prefer the Cummins Onan Muffler.
| Walker Exhaust Muffler Specifications | |
|---|---|
Weight | 0.1 pounds |
Dimension | 20 x 9 x 4 inches |
Highlight Features | OE-style louvered tubes, domed heads, hangers, brackets and pipe routings; 100% stainless-steel construction; 1 1/2-inch inlet |
Walker Exhaust Muffler is a compact, expandable, and super durable muffler for generators.
Easy to install (Quiet Muffler For Generator): New Stens Muffler
- Compact & Lightweight
- 1 ¾-inch inlet
- Simple to install
- Pretty quiet
- Good build
- Not so sturdy
New Stens Muffler features 1 3/4-inch inlet, which is suitable for some smaller generators. This muffler is compact and lightweight. It is also simple to install with a direct bolt-on. The performance is decent - it reduces the noise significantly.
This muffler is not originally designed for generators; however, it suits generators, especially high-powered ones, pretty well.
Overall, New Stens Muffler is a well-built muffler; however, it seems that this muffler is not so sturdy, so avoid any impact.
| New Stens Muffler Specifications | |
|---|---|
Weight | 0.06 pounds |
Dimension | 16.1 x 3.5 x 3.5 inches |
Highlight Features | 1 3/4-inch inlet; Straight out exhaust |
New Stens Muffler features 1 3/4-inch inlet, which is pretty simple to install.
Smaller inlet (Quiet Muffler For Generator): Maxpower Cylinder Muffler
- 3/4-inch inlet
- Excellent performance and flow
- Reasonably quiet
- Affordable
- Not so durable
This old school Maxpower Cylinder Muffler is super small, simple, and affordable. It features a 3/4-inch inlet, so ideal for a smaller exhaust system. Overall, this muffler provides excellent performance and flow, while maintaining reasonably quiet.
This small muffler is preferred for generator exhaust systems. The three mufflers above are more suitable for motorbikes and maybe too much for a generator.
This Maxpower Cylinder Muffler is not so durable. The Chrome coating peels off pretty quickly, then the base shell gets rusty not so long after. You can paint it before the rust becomes worse. At the given affordable price, this muffler is still a great choice.
| Maxpower Cylinder Muffler Specifications | |
|---|---|
Weight | 0.6 pounds |
Dimension | 2.3 x 9.8 x 4 inches |
Highlight Features | Chrome coating; 3/4-inch inlet |
This old school Maxpower Cylinder Muffler is super small, simple, and affordable.
How To Choose The Quietest Muffler For Generator?
When it comes to mufflers for generators, here are some priorities that you can consult:
- The inlet size: First and foremost, the muffler’s inlet has to fit your generator exhaust outlet, or you’ll need to purchase a separate adapter to connect them.
- Output flow: The output flow should be consistent and reliable in order to maintain a consistent performance of the engine. A muffler that makes the exhaust process faster also makes the process of fuel consumption faster, so the engine can go faster, adding more power to your generator.
- Quietness: This is the main reason that everyone would install a muffler to a generator. Generators tend to be not so loud. And a good muffler can reduce this noise even lower. You don’t have to buy a super expensive muffler for your generator, just a budget muffler, which cost only ten or twenty bucks, would do the job.
Which Brands Make The Quietest Muffler For Generator?
Cummins
Cummins is one of the biggest brands when it comes to the engine industry. It was founded in 1919; up to now, it has successfully built a worldwide brand on engines, generators, power systems, and other components. In 2019, Cummins ranked 128 in Top Fortune 500 with $23.6 billion of revenue and 61,600 employees. Over 100 years in operation manifests in the quality and innovation of their products. In addition to quality products, Cummins is also well-known for its social responsibility - Their main community projects focus on the environment, education, and equality of opportunity. Cummins is the brand you can trust.
Walker Exhaust
As the name has said it all, Walker Exhaust is a brand that dedicates more than 100 years to making exhaust systems. This is one of the leaders in the replacement emission control components and systems. Besides mufflers, they also provide catalytic converters, complete cat-back exhaust systems, pipes, resonators, and other components for car and SUV's exhaust systems. When it comes to Walker Exhaust, you'll be assured of OE-style products with every detail are made to the highest level. Walker Exhaust's warranty policies are also something worth mentioning, you'll always be backed up with their lifetime warranty when purchasing any of their products.
MaxPower RPMs
MaxPower RPMs is a famous brand that makes engines and engine kits. Their 4-stroke cylinders are really state of the art. MaxPower RPMs is the combination of two brands Max Power, which was founded in 1997, and Rick Peterson Motorsports, which was founded in the mid-80s. At present, MaxPower RPMs provides from engines to engine parts, engine repair services, and other kits - mufflers are one of them. When it comes to MaxPower RPMs mufflers, you can be confident about their excellent performance and flow at a reasonable price.
FAQs
Why is my generator making noise?
If your generator starts making noise after a while of use, there is a big chance that it is wearing down or in need of repairing. You can have a check to see if there is any issue with your generator. If your generator is making noise from the beginning, you may want to consider installing a muffler to your generator, it would help reduce the noise significantly.
What does 50 decibels sound like?
A sound level of 50 decibels is considered pretty quiet, which is equivalent to a conversation at home.
Can I put a quieter muffler on my generator?
Yes, sure. A muffler helps reduce the noise of your generator.
How do you reduce the noise of a generator?
The easiest and simplest way to reduce the noise of a generator is to install a muffler.
Can you cover a generator while it is running?
Yes. It is recommended since covering a generator with a cover helps protect the generator from any wet weather condition. However, remember not to cover the exhaust pipe.
Conclusion
A muffler can reduce the noise of your generator significantly. Above are my top 4 picks of the quietest muffler for generator. I hope you find this article helpful.
