Pampero Posted July 27, 2020 Share Posted July 27, 2020 My muffler rotted out, so I did some research and Summit racing list a muffler for my coach WKL-21969. this muffler is a little small on the round diameter, but without taking the old one apart I figure that the clamps will tight around. I was wrong. The way the clamps are installed on my coach will not adjust to a muffler that is not 11" in diameter. The intake is a little off, but it could work, The exhaust is not centered, so it all is a waste of time and $25 + in return shipment. So I am looking in the internet to a muffler with the exact dimensions and I found out this one: https://shop.findmyrvparts.com/monaco-rv-muffler-27-inch-x-11-inch-26330N-p/190242.htm?gclid=CjwKCAjw9vn4BRBaEiwAh0muDJOst9YqyIOknw_h5zUsgFwxwY-hcGpBkrINU1Vkod2hSqpKpU07DxoCIbUQAvD_BwE&click=3309&utm_source=googlebase&utm_medium=shoppingengine At $385 it is acceptable, but they want $56.00 in shipping and will not accept that I will give my business FedEx account, they could pack it and give it to them but I am guessing they making money in the shipping too. So I found this muffler:https://triplertruckparts.com/m065044-donaldson-muffler/ At $152.00 and free shipping it is much better deal. Now, I had an auto repair business for 30 years and I worked on cars for 40 years so I know that not all exhaust parts are no made equal. The life of this muffler may not be the same as the original, I am sure that will not be, but I can buy two of this one for less of one of Veuwrink's. Even though it looks pretty much like the original.. So that is my info on exhaust. I know some of you made modifications but I always tried to install original or perfect fit. William Link to comment Share on other sites More sharing options...
Robert U Posted July 27, 2020 Share Posted July 27, 2020 I live in the Atlanta area. Last year when my muffler rusted out I went to Jacks Diesel and Truck Service in Marietta, Ga. They got an exact fit from a truck Parts place and installed it for about $400 out the door. I have a 2000 Dip. Bob U Link to comment Share on other sites More sharing options...
Dr4Film Posted July 27, 2020 Share Posted July 27, 2020 Our founder, Bill D, was always a major proponent of Aero Turbine Mufflers. I haven't had to replace mine as yet but plan to use the Aero Turbine muffler when I do. The one that you have linked to is certainly looking like an OEM replacement. Link to comment Share on other sites More sharing options...
John Haggard Posted July 27, 2020 Share Posted July 27, 2020 (edited) About 4 years ago It was time for a new exhaust system. I got everything I needed from NAPA 4 miles down the road. Except the Aero Turbo resonator Instead of using a muffler I ordered a stainless Resonator for about $125. So new flexible tubing, new elbow and resonator for under $300. Time, 3 hours start to finish parked in a campground. Edited July 27, 2020 by John Haggard Added technical details Link to comment Share on other sites More sharing options...
Onthego Posted July 27, 2020 Share Posted July 27, 2020 Reading the spec. On the two muffler the inlet and outlet are different the first one say the inlet & out are 4” the other one say 2.5” . I would call tripletruck parts. ? Is your muffler 4” side inlet and the outlet also 4” page 98 list muffler for Cummins model and hp https://www.donaldson.com/content/dam/donaldson/engine-hydraulics-bulk/catalogs/Exhaust/North-America/F110028-ENG/Exhaust-Product-Guide.pdf Link to comment Share on other sites More sharing options...
Paul J A Posted July 27, 2020 Share Posted July 27, 2020 3 hours ago, Pampero said: My muffler rotted out, so I did some research and Summit racing list a muffler for my coach WKL-21969. this muffler is a little small on the round diameter, but without taking the old one apart I figure that the clamps will tight around. I was wrong. The way the clamps are installed on my coach will not adjust to a muffler that is not 11" in diameter. The intake is a little off, but it could work, The exhaust is not centered, so it all is a waste of time and $25 + in return shipment. So I am looking in the internet to a muffler with the exact dimensions and I found out this one: https://shop.findmyrvparts.com/monaco-rv-muffler-27-inch-x-11-inch-26330N-p/190242.htm?gclid=CjwKCAjw9vn4BRBaEiwAh0muDJOst9YqyIOknw_h5zUsgFwxwY-hcGpBkrINU1Vkod2hSqpKpU07DxoCIbUQAvD_BwE&click=3309&utm_source=googlebase&utm_medium=shoppingengine At $385 it is acceptable, but they want $56.00 in shipping and will not accept that I will give my business FedEx account, they could pack it and give it to them but I am guessing they making money in the shipping too. So I found this muffler:https://triplertruckparts.com/m065044-donaldson-muffler/ At $152.00 and free shipping it is much better deal. Now, I had an auto repair business for 30 years and I worked on cars for 40 years so I know that not all exhaust parts are no made equal. The life of this muffler may not be the same as the original, I am sure that will not be, but I can buy two of this one for less of one of Veuwrink's. Even though it looks pretty much like the original.. So that is my info on exhaust. I know some of you made modifications but I always tried to install original or perfect fit. William William Try this web site. dynaflexproducts.com They are the largest manufacturer of Class 8 truck exhaust components in the U S A. Great product catalog. I purchased a Resonator from them, thru a distributor. At that time it had the best back pressure specifications. Most Class 8 truck Brand service entity's are distributors. Paul A Link to comment Share on other sites More sharing options...
Pampero Posted July 27, 2020 Author Share Posted July 27, 2020 3 hours ago, Onthego said: Reading the spec. On the two muffler the inlet and outlet are different the first one say the inlet & out are 4” the other one say 2.5” . I would call tripletruck parts. ? Is your muffler 4” side inlet and the outlet also 4” page 98 list muffler for Cummins model and hp https://www.donaldson.com/content/dam/donaldson/engine-hydraulics-bulk/catalogs/Exhaust/North-America/F110028-ENG/Exhaust-Product-Guide.pdf Gee, Thanks, I made a mistake, the price was right but the specs are wrong. I called Dynaflex, but I will need an OEM part number to have them cross out. Link to comment Share on other sites More sharing options...
jacwjames Posted July 27, 2020 Share Posted July 27, 2020 I have the parts breakdown for my exhaust system. It shows the OEM part number as 2633ON but it does not give the vender. 1 Exhaust System.pdf Link to comment Share on other sites More sharing options...
Pampero Posted July 27, 2020 Author Share Posted July 27, 2020 19 minutes ago, jacwjames said: I have the parts breakdown for my exhaust system. It shows the OEM part number as 2633ON but it does not give the vender. 1 Exhaust System.pdf 50.59 kB · 0 downloads I am not so sure about this, Veurink's says that 2000 and 2002 Windsor are using the same exhaust muffler, but your picture shows a different one. What engine is in your coach? Thank you for the info. Link to comment Share on other sites More sharing options...
jacwjames Posted July 27, 2020 Share Posted July 27, 2020 I have the 8.3L 350 ISC. The parts page is from the Monaco website that could be accessed by RV maintenance people. Back in 2010, while they were in bankruptcy, they left a back door open. When I got on line I downloaded ~100 of pages similar to this. I have no reason to doubt it is not correct, I've used this to research and buy parts without a problem. It is somewhat generic for the model year as some pages will have part number changes based on build date and coach number. Link to comment Share on other sites More sharing options...
Onthego Posted July 27, 2020 Share Posted July 27, 2020 I found this one https://www.summitracing.com/parts/wlk-21969?seid=srese1&gclid=CjwKCAjw9vn4BRBaEiwAh0muDLWSNuCX4uRS_fKehcbjM5ordXIIWESdB08q2ZX7qXFgguIztuh42hoCljwQAvD_BwE Link to comment Share on other sites More sharing options...
6Wheels Posted July 28, 2020 Share Posted July 28, 2020 The Chinese muffler has 2.5" in/outlets, the expensive one has 4" The Chines muffler is not catalytic, the expensive one is a catalytic muffler. Seems you missed these points? Link to comment Share on other sites More sharing options...
dl_racing427 Posted July 28, 2020 Share Posted July 28, 2020 When my muffler rusted through I replaced it with a straight piece of 4" tubing. Much cheaper and more permanent. Actually I replaced the entire exhaust system except for the stainless tailpipe, but with no muffler I can only slightly tell the difference in sound from the drivers seat. Outside it is noticeable, but not obnoxiously loud. You can hear the turbo though. Link to comment Share on other sites More sharing options...
John Haggard Posted July 28, 2020 Share Posted July 28, 2020 Smart man I like Keep it simple and efficient I have never tracked a Monaco parts # number in 15 years Link to comment Share on other sites More sharing options...
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