View Full Version : Muffler Advice?
11-25-2008, 08:31 AM
I am looking into getting an aftermarket muffler and wanting something with a deep throaty sound with very little or no drone. A loud raspy sound is what I want to stay away from. Any input would be appreciated.
11-25-2008, 08:58 AM
Just remove the muffler, and leave the cat. It'll do exactly what you want.
11-25-2008, 09:22 AM
Lose the kitty too IMHO. The way mine is done, no drone at all.
I was in your shoes not long ago and i went with a Magnaflow, sounds good no loud drone. You could also look into MBRP or a Donaldson. I here that the Donaldson is more quiet than the above i mentioned, until you stand on it. I would definetly put something on there, if you want to have a conversation with someone while driving.
11-25-2008, 09:40 AM
The flowmaster hush power muffler sounds great in my book. Very throaty sound
Got my flamesuit ready, but i was told to have something on there b/c the cummins has alot of back pressure. Running with no muffler you stand a chance of burning a valve among other things. Some folks are not as sensitive to drone as others.
11-25-2008, 09:54 AM
I have not had a muffler in a lot of miles, I think around 50,000? No valve problems here, but I also left the cat on. I'm not sure how you loose back pressure when there's a turbo inline though. You can't even tell the muffler is gone until you give it some go pedal - from inside the truck anyway. Outside it's low, and loud when you give it some fuel to burn.
11-25-2008, 12:49 PM
The less you have the better off you are with a turbo. I have the Donaldson one for semi's, just straight through 4" and 51" long and it is as quiet as stock. I forgot the part number, but it's too quiet for you anyway.
11-25-2008, 05:56 PM
Magnaflow, NO drone at highway speeds and you cant hear a thing until you get in it.
11-25-2008, 06:33 PM
Got my 40" Nelson from the local Cummins storefor $67.
4" straight through, no drone, only slightly louder than stock at an idle, nice when you punch it.
Pics and part number in my gallery..
11-25-2008, 09:21 PM
5" in and out 51" long donaldson. You will need 4-5 reducers. Part# is M090535. Can also get this at ryderfleetproducts.com. This is the most free flowing muffler donaldson makes. I have the 40" donaldson on my 90. It sounds very good,and is the second highest flowing. Part# is M085171.. Hope this helps..Justin
01-26-2009, 08:27 PM
Well.....I thought I wanted that. I bought a used 5" magna flow exhaust with the big Donaldson....great when idle or even just cruising...put the 5er on and forget it. 1450 rpm is plain awful. I like it except when I pull....looking at the Hushpower to see how they do.
...wanting something with a deep throaty sound with very little or no drone.
You want to have your cake and eat it too? [laugh]
01-27-2009, 10:44 AM
I just deleted the muffler and left the cat in place. It's a little louder in the cab but not much. It sounds good on the outside. I get a lot of compliments on the way it sounds and it is more responsive as well.
01-29-2009, 04:27 PM
Aeroturbine and Magnaflow are the deepest and throatiest I've heard....
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