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Trucks [ Eighteen Wheelers ] Roll On Big Mama. Forum/Discussion about Eighteen Wheeler Trucks. What truck do you like or dislike? Is your favorite truck a Mack, Peterbilt, Kenworth, Marmon, Volvo or Freightliner? Which diesel engine do you prefer; Detroit Diesel, Cummins, or...

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Old 2 Weeks Ago
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Cool Pricing..
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
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  ^ Top   #22  
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do mufflers get restrictive with age. i think mine is over 12 years old
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Quote:
Originally Posted by 377pete View Post
do mufflers get restrictive with age. i think mine is over 12 years old
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.
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'06 379 Pete with a MXS C-15 550 with heavy haul program, 200gph FASS, high flow mufflers, fuel and boost harnesses, shimmed fuel pump, Bully Dog downloader, Spinner II bypass filter, Schaeffer's synthetics in all boxes, and a 18 speed tranny. Leased to Schneider on their Choice program.
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i want another muffler but wat one without the noise and better flow than stock. any suggestion?
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Originally Posted by 377pete View Post
i want another muffler but wat one without the noise and better flow than stock. any suggestion?
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.
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'06 379 Pete with a MXS C-15 550 with heavy haul program, 200gph FASS, high flow mufflers, fuel and boost harnesses, shimmed fuel pump, Bully Dog downloader, Spinner II bypass filter, Schaeffer's synthetics in all boxes, and a 18 speed tranny. Leased to Schneider on their Choice program.
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Quote:
Originally Posted by 377pete View Post
i want another muffler but wat one without the noise and better flow than stock. any suggestion?
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.
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i will see if i can get it this weekend and give you an update on sound.
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i will see if i can get it this weekend and give you an update on sound.
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.
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i just installed a set of walker mega flows. they are pretty nice. straight thru design
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i just installed a set of walker mega flows. they are pretty nice. straight thru design
Do you have flow #s on these ?
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