MagnaFlow Muffler Question

Discussion in 'Heavy Duty' started by zogg, Dec 10, 2016.

  1. Squirrel6.4

    Squirrel6.4 Junior Member

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    Just about any muffler you put on in place of the stock one will help but you will get more drone in the cab. I just replaced the stocker for a 3.5" straight pipe and left the res on.Almost no drone at all in the cab. But you definitely hear it when you get on it. Ideal and cruising speeds are fine and even pulling a cargo trailer it's not bad.

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  2. zogg

    zogg Senior Member

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    UPDATE......
    Well, the magnaflow muffler arrived. I was going to install it myself, but there were issues. The magnaflow is a center outlet on one end and an offset on the other. The factory muffler is an offset on one end and an opposite offset on the other end. Also, it was a few inches shorter and I could not find and 3 1/2 inch pipe.

    So, I went to the local muffler shop. I knew I was in trouble when the guy said "come into the shop and see the issues". Due to the non-comparable offsets, he first suggested taking a piece of pipe and cutting it and welding it back together to creat an angle, since he can't bend 3 1/2 inch pipe. The next suggestion was to cut the original pipe at the converter and after the muffler.....that would allow the magnaflow to be installed with a piece of straight pipe from the converter to the tailpipe....worked well.
    Then he said "do you want steel aluminized pipe or stainless steel pipe." I went with the stainless pipe.
    Then I got the bill.....$226.44 plus the $137 for the muffler and a two hour wait. A little more than I planned on by about $100 overall, but it looks great and it was a quality job.
    The sound is another issue. It sounds really nice when I step into it, but normal driving is quiet as a church mouse. No drone at any speed except when it goes into four cylinder mode.....I left the factory resonator on the truck since I tow a fifth wheel.
    My experience with magnaflow mufflers I'd that they open up a little after a few thousand miles.....can't wait!
    Overall good and I'm relatively satisfied. Next post will identify any mpg increase,,,,not expecting any increase. It does shift gears at a lower rpm, and doesn't downshift on hills where it used to..,,all good
     
    tjfdesmo likes this.
  3. moonshinexxx

    moonshinexxx Member

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    Good stuff! Glad the install went to suit you!
     
  4. Cmsharp

    Cmsharp Senior Member

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    I put that same muffler on last 2 rams. Loved it. I never noticed any droning at all, but thats just my opinion. Just the right amount of sound. It seemed to get a little deeper over 5k miles and i think my gas mileage improved about .5 mpg
     
  5. zogg

    zogg Senior Member

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    I have only had it on for about 350 miles, but I seemed to have picked up about .5 mpg also and maybe 1.0 mpg at 75 mph....getting a tad louder, too, but not too much..
     

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  6. Slick61

    Slick61 Member

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    did you look into the Mufflex/Magnaflow DOD250035??? (Google it, if you haven't) Direct fit/no welding, reversible, & about the same (or less) cash...
     
  7. Terry3blue

    Terry3blue Junior Member

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    Second the mufflex, love mine great fit. 30 minutes tops on install laying on ground.
     
  8. jettajam1

    jettajam1 Senior Member

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    Third vote for the Mufflex. Super easy install and the sound is terrific. My 16 year old son and I had it installed in about an hour. I did have a leak however on the left hand pipe (exiting the muffler). I had to break torque and retighten, but all is good now......love it!


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  9. stoney

    stoney Senior Member

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    I am right now on the fence with ordering the Mufflex, aside from a nicer tone, any other positives or negatives?
     
  10. JLEONARD

    JLEONARD Junior Member

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    Im seeing the MF 12909 everywhere for around $153. Walmart online has them for $134. Is there any difference in the muffler from Walmart??
     

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