high flow mufflers

Discussion in 'Trucks [ Eighteen Wheelers ]' started by poorrednek, Oct 27, 2009.

  1. SpeedRacer

    SpeedRacer Light Load Member

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    I went by TruckPro and they didn't have any listed in stock anywhere, but they could order straight from Donaldson for about $120. Looking like Ryder online might be the cheapest (if I'm reading it right shipping is only $15) unless NAPA is close to that.

    Eric
     
  2. 377pete

    377pete Light Load Member

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    do mufflers get restrictive with age. i think mine is over 12 years old:biggrin_25521:
     
  3. pullingtrucker

    pullingtrucker Road Train Member

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    Yes, stock mufflers get more restrictive over time due to soot deposits. If the muffler has a screen type baffle in it then the muffler can become really restrictive. I see now way the Donaldson high flow unit could become restrictive since it is basically a straight through design like a glass pack...of course with out all the extra noise of the glass pack.
     
  4. 377pete

    377pete Light Load Member

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    i want another muffler but wat one without the noise and better flow than stock. any suggestion?:yes2557:
     
  5. pullingtrucker

    pullingtrucker Road Train Member

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    Go with the Donaldson muffler that we have been talking about earlier in this thread. There is just a tad more noise, but the flow is increased to a point of almost flowing as much as a straight pipe.
     
  6. Big Duker

    Big Duker "Don Cheto"

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    Like every thing else in life it is a trade out. I doubt if there is any muffler that will do what you want. Even cars with flowmasters and the like are a little louder than stock. It's up to you. Quieter or better performance and maybe some jingle in your pocket. If your muffler is very old replacing it with a stocker may help performance. Most that I have looked at have 1/4 inch holes that clog over time.
     
  7. 377pete

    377pete Light Load Member

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    i will see if i can get it this weekend and give you an update on sound.
     
  8. SpeedRacer

    SpeedRacer Light Load Member

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    Let us know 377pete.

    Mine are probably original too, putting them at about 8yrs old. I'm feeling I'll notice an improvement for sure.
     
  9. lastgoodusername

    lastgoodusername Medium Load Member

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    i just installed a set of walker mega flows. they are pretty nice. straight thru design
     
  10. PaulE

    PaulE Medium Load Member

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    Do you have flow #s on these ?
     
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