2000 Dodge Cummins needs muffler

Discussion in 'Trucks and Trailers' started by Stonewall, May 8, 2007.

  1. Stonewall

    Stonewall LawnSite Senior Member
    Messages: 280

    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?
  2. dozerman21

    dozerman21 LawnSite Bronze Member
    Messages: 1,171

    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.
  3. stangman35

    stangman35 LawnSite Member
    Messages: 62

    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.
  4. IA_James

    IA_James LawnSite Silver Member
    from Iowa
    Messages: 2,592

    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.
  5. Stonewall

    Stonewall LawnSite Senior Member
    Messages: 280

    Thanks. I'll check around.
  6. TGM

    TGM LawnSite Senior Member
    Messages: 931

    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).
  7. Pro-Scapes

    Pro-Scapes LawnSite Platinum Member
    Messages: 4,180

    Jonathan of all the times I have met with you I have never noticed your Dodge was loud :)
  8. mag360

    mag360 LawnSite Silver Member
    Messages: 2,445

    A muffler will quiet down the exhaust. Consider having the valves adjusted to spec if you are anywhere near or over 100,000 miles. That will quiet down the motor some, and make it run better.
  9. lawnmaniac883

    lawnmaniac883 LawnSite Silver Member
    Messages: 2,613

    Donaldson 51'' muffler gets my vote
  10. Stonewall

    Stonewall LawnSite Senior Member
    Messages: 280


    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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