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CUMMINS NW Cummins 1551258 Onan Muffler

4.7 4.7 out of 5 stars 255 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Automotive Replacement Exhaust Mufflers by Cummins
$121.68
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Purchase options and add-ons

Brand Cummins
Item dimensions L x W x H 22.63 x 8.88 x 7.25 inches
Vehicle Service Type Car
Item Weight 16 ounces
Shape Round

About this item

  • Package Dimensions: 18.288 L X 57.912 H X 22.86 W (Cm)
  • Made In United States
  • Product Type:Auto Accessory
  • Package Weight: 2.676 Kilograms
› See more product details

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CUMMINS NW Cummins 1551258 Onan Muffler
$121.80
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Cummins Onan 1552174 Exhaust Hanger
$19.47
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Walker Exhaust 35325 Exhaust Clamp, 1 Count (Pack of 1)
$7.11
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Top Brand: Cummins

Highly Rated
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Product Description

155-1258 Cummins Power Generation Generator Exhaust MufflerCummins Power Generation is a world leader in the design and manufacture of power generation equipment, including PowerCommand standby and prime power systems.

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CUMMINS NW Cummins 1551258 Onan Muffler
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Price$121.80$17.99$38.66$39.88$35.95$38.55
Delivery
Get it as soon as Saturday, May 11
Get it as soon as Saturday, May 11
Get it as soon as Saturday, May 11
Get it as soon as Saturday, May 11
Get it May 9 - 13
Get it as soon as Saturday, May 11
Customer Ratings
4.74.7 out of 5 stars255
4.34.3 out of 5 stars145
4.84.8 out of 5 stars13
4.24.2 out of 5 stars16
4.04.0 out of 5 stars84
4.54.5 out of 5 stars6
Value for money
4.8
4.5
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3.2
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Easy to install
4.6
4.5
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4.2
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Sold By
Amazon.com
FVRITO
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Pro-Po Parts Shop
The Shelby Mall
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Tractor
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Customer reviews

4.7 out of 5 stars
4.7 out of 5
255 global ratings

Customers say

Customers like the quality, fit, and value of the muffler. For example, they say it's a great value, and the exact fit replacement for their Onan RV generator. They appreciate the quiet operation and the sturdy construction.

AI-generated from the text of customer reviews

19 customers mention19 positive0 negative

Customers are happy with the noise level of the muffler. They say it's super quiet, does a great job of quieting down their RV generator, and is heavy duty. Some customers even say that they can't hear it running when in the motorhome.

"...Reduces tail pipe noise from 72 to 62 dB. Although I had to modify to fit properly as it was not intended for this application it was a fantastic..." Read more

"Installed easily and is a perfect match replacement. Generator has never been so quiet." Read more

"Made my Onan nice and quiet!!" Read more

"This worked perfect for my onan generator. It is quiet fits well." Read more

16 customers mention14 positive2 negative

Customers like the fit of the muffler. They say it's a correct fit and an exact replacement muckler for their Onan.

"exact fit for my Onan generator, no dislikes" Read more

"Fit well, easy to install, quiet as a nun in church. Nice to have an original replacement part like this available after all these years!" Read more

"...It was a direct fit. Installation was pretty easy, if you know how to weld...." Read more

"Came on time, and fit perfectly, very pleased with the product." Read more

13 customers mention13 positive0 negative

Customers are satisfied with the quality of the muffler. They mention that it is well built, sturdy, and quiet operating. Some say that it's a perfect OEM replacement and easy to install.

"It is excellent quality, and made my project of reducing noise from generator substantially, very..." Read more

"Installed easily and is a perfect match replacement. Generator has never been so quiet." Read more

"Came on time, and fit perfectly, very pleased with the product." Read more

"Easy to install, exact replacement." Read more

8 customers mention8 positive0 negative

Customers appreciate the value of the muffler. They say it's a great product that saves them money.

"...In so tight I am worried I will damage the muffler. Saved money, as it is just a bit of $100 cheaper than the Generac muffler being marketed on..." Read more

"...Literally saved me $100's. Great muffler, great value!! thank you!!" Read more

"This is a quality product that is very fairly priced and quiet." Read more

"As described. Perfect fit factory replacement. Great price." Read more

7 customers mention7 positive0 negative

Customers find the installation process of the muffler to be easy.

"Installed easily and is a perfect match replacement. Generator has never been so quiet." Read more

"Fit well, easy to install, quiet as a nun in church. Nice to have an original replacement part like this available after all these years!" Read more

"...It was a direct fit. Installation was pretty easy, if you know how to weld...." Read more

"Easy to install, exact replacement." Read more

6 customers mention6 positive0 negative

Customers are satisfied with the performance of the muffler. For example, they mention it works well and is a fraction of the cost of one from generac.

"...made my project of reducing noise from generator substantially, very successful...." Read more

"...have a generac and was 1.75 inch. but works well and a fraction of the cost of one from generac...." Read more

"Used this on an onan generator...worked great. Correct fit" Read more

"perfect, very happy" Read more

Major reduction in noise level for my generator.
5 Stars
Major reduction in noise level for my generator.
It is excellent quality, and made my project of reducing noise from generator substantially, very successful. Reduces tail pipe noise from 72 to 62 dB. Although I had to modify to fit properly as it was not intended for this application it was a fantastic addition to gen set.
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Top reviews from the United States

Gary Mills
5.0 out of 5 stars Major reduction in noise level for my generator.
Reviewed in the United States on March 16, 2024
Verified Purchase
The media could not be loaded.
 It is excellent quality, and made my project of reducing noise from generator substantially, very successful. Reduces tail pipe noise from 72 to 62 dB. Although I had to modify to fit properly as it was not intended for this application it was a fantastic addition to gen set.
Customer image
Gary Mills
5.0 out of 5 stars Major reduction in noise level for my generator.
Reviewed in the United States on March 16, 2024
It is excellent quality, and made my project of reducing noise from generator substantially, very successful. Reduces tail pipe noise from 72 to 62 dB. Although I had to modify to fit properly as it was not intended for this application it was a fantastic addition to gen set.
Images in this review
Customer image
Customer image
One person found this helpful
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paul e lawson Jr
5.0 out of 5 stars Good fit
Reviewed in the United States on November 23, 2023
Verified Purchase
I like the fit,and this went on a Antique RV ginny
Helpful
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Fat Joe
5.0 out of 5 stars Great product
Reviewed in the United States on May 20, 2023
Verified Purchase
Installed easily and is a perfect match replacement. Generator has never been so quiet.
Helpful
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Nick
5.0 out of 5 stars Perfect fit
Reviewed in the United States on April 22, 2024
Verified Purchase
Made my Onan nice and quiet!!
Helpful
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Snow Bird
5.0 out of 5 stars Glad I found this!
Reviewed in the United States on February 25, 2024
Verified Purchase
So much better with this on, instead of a long pipe running up to the front of the right behind the driver's seat, gassing me out if I opened the window! just redirect the pipe to the rear, into the muffler and out next to the big exhaust pipe.
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Mark L.
5.0 out of 5 stars Quiet
Reviewed in the United States on September 16, 2023
Verified Purchase
This worked perfect for my onan generator. It is quiet fits well.
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Monroe McAnally
5.0 out of 5 stars Very good product for the money
Reviewed in the United States on June 12, 2022
Verified Purchase
exact fit for my Onan generator, no dislikes
One person found this helpful
Helpful
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EngineerByProxy
5.0 out of 5 stars Great OEM Replacement
Reviewed in the United States on October 26, 2021
Verified Purchase
Fit well, easy to install, quiet as a nun in church. Nice to have an original replacement part like this available after all these years!
2 people found this helpful
Helpful
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Top reviews from other countries

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andre brisson
5.0 out of 5 stars Tres bon achat
Reviewed in Canada on May 28, 2023
Verified Purchase
Piece originale qu'il me fallait
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Fat cat
5.0 out of 5 stars This muffler made for Onan but fits a Generac Q-5500 Just fine
Reviewed in Canada on June 11, 2021
Verified Purchase
It arrived very fast, well packaged and works like a charm. A few minor adjustments to allow for a tight piping fit and it's good to go. The best price I could find for this muffler and well worth it, Thank you very much.
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Robert Frew
5.0 out of 5 stars Pretty nice muffler, super quiet yet allows flow.
Reviewed in Canada on February 20, 2022
Verified Purchase
Customer image
Robert Frew
5.0 out of 5 stars Pretty nice muffler, super quiet yet allows flow.
Reviewed in Canada on February 20, 2022
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Customer image
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inchgallo
4.0 out of 5 stars Good Replacement
Reviewed in Canada on April 10, 2024
Verified Purchase
Exact match to my onan factory one,
Seams well built,
The sound is the same
Good purchse
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John Gardner
5.0 out of 5 stars Quiet and better than after market.
Reviewed in Canada on March 24, 2021
Verified Purchase
More expensive than after market but oh so much quieter. Worth the cost
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