What muffler are y’all running? Old Caterpillar (Peterbilts and Belt Buckles)

Discussion in 'Ask An Owner Operator' started by staceydude, Jul 19, 2022.

  1. Magoo1968

    Magoo1968 Heavy Load Member

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    Donaldson flow through mufflers work well you get some tone but no real roar I find ..
     
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  3. kranky1

    kranky1 Road Train Member

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    I had to find mufflers to fit the plumbing for the catalytics on my W900L. Found a Grand Rock heavy equipment muffler rated at -18dB and put a pair of them on. Dropped 100* off the exhaust, and it sounds nice without being overly loud. More or less the same as my B’s that have vertical mufflers with no baffle plates.
     
  4. wore out

    wore out Numbered Classic

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    I tried to convince Colorado DOT that my spools had inserts one time.....I got the ticket I deserved anyway lmao
     
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  5. staceydude

    staceydude Road Train Member

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    Thanks for all the info and suggestions yall!
     
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  6. staceydude

    staceydude Road Train Member

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    That cracked me up because I’d use the same excuse lolol

     
  7. Catmando

    Catmando Road Train Member

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    Colorado has no sense of humor for some reason about that .. where I lived out there it seemed like I got a lecture & tickets 2 or 3 times a mouth for straight pipes.. I finally put a resonator underneath.. mostly just to make them crawl underneath to look.if they would looked hard enough they would have seen the weld seam where it had been opened up
    ( for inspection purposes only of coarse )..lol
    BTW.. Colorado don't have any hot aviator glasses wearing strawberry short cake DOT officers like Ya'll got there in Arkansas.. :)
     
    Last edited: Jul 20, 2022
  8. abyliks

    abyliks Road Train Member

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    Donaldson has a flow through that Pittsburg power reuses that is pretty quite but has a nice bark to it if you are getting on it,
     
    Last edited: Jul 21, 2022
  9. rollin coal

    rollin coal Road Train Member

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    M100463 is the Donaldson muffler rebranded as Pittsburgh Power. It's a 5" free flow muffler. I ran two of them under the bunk on my old T600. My FLD just has the one on the back of the cab. They quiet it down good and doubtful there's any added backpressure or higher egts. You look thru the end of one and it's wide open free flow nothing there obstructing.
     
  10. HillbillyDeluxeTruck

    HillbillyDeluxeTruck Road Train Member

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    Good thread. At some point in the near future Im putting on some 7" pipes on mt truck and as much as I want to just straight pipe it, I think a muffler underneath will be a good idea.
     
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  11. Magoo1968

    Magoo1968 Heavy Load Member

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    Also if it’s too quiet just reverse the direction of flow
     
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