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2000 Dodge Cummins needs muffler

Stonewall

LawnSite Senior Member
Location
Nacogdoches, TX
I bought this truck used a couple of years ago with a straight exhaust and it sounds like a Mack truck. My kids call it the "thunder truck." I'm ready to quiet it down, but a local muffler shop said that the only muffler he could get to put on it would not quiet it down much. Anybody know if that's true? Do I have any other options?
 

dozerman21

LawnSite Bronze Member
Location
Indianapolis, IN
Any muffler will quiet it down compared to how loud it is straight piped. There are a bunch of different companies who make mufflers that are louder than stock, but not as loud as no muffler. I assume it's a 4" pipe? Banks, Dynomax, Flowmaster, MBRP, etc... all make them. If it's a 5" pipe you may need some adapters too.
 

stangman35

LawnSite Member
Try a parts store,like NAPA or something.Ask for a stock muffler for your truck.Should be pretty easy to find.Unless the truck has larger than stock straight pipe might have to have some adaptors to make it fit.
 

IA_James

LawnSite Silver Member
Location
Iowa
There should be room under the truck for a stock semi muffler. Donaldson or Nelson being the main two. You should have 3.5" pipe, they make 'em in that size, and if it's and "oversize" exhaust, it's no biggy, they make bigger. Plus they are alot cheaper.
 

TGM

LawnSite Senior Member
Location
seacoast, NH
a stock 2000 exhaust is 3" OD except in between the resonator and muffler (originally of course). put a flow-through muffler on it to keep some of the sound, but quiet it down (especially in the cab).
 
OP
S

Stonewall

LawnSite Senior Member
Location
Nacogdoches, TX
Billy,

If only you knew. Maybe if you turned your music down some.

Thanks for all the suggestions.

The truck has over 240k on it, but I haven't put but 30k on it and don't know if/when the valves were adjusted. I just dropped over a grand on getting a cracked fuel line replaced that contributed to hard starting (not sure it's completely fixed). How much for the valve job?
 
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