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Magnaflow Performance Mufflers Part #12588 Customer Reviews

Average Rating

7 Customer Reviews

Great muffler

Reviewed by logan l (TUCSON, AZ) Reviewed for a 2016 Dodge Ram — Aug 10, 2017 12:54 AM

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Magnaflow is a great muffler I've used them in all my trucks. They have a deep tone. And most importantly no restrictions. The only reason I gave installation three stars is because it doesn't come with exhaust hangers so you will need to have a muffler shop weld it up and hangers welded to fit your OEM location. It sounds great, love the quality, and price.

Not Quite What I Expected but Still Like It.

Reviewed by Dan S (Coldwater, OH) Reviewed for a 2009 Dodge Ram — Aug 12, 2016 1:52 PM

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Had the #12588 installed with the Y-pipe upgrade on my 2009 Dodge Ram. This is my first Magnaflow muffler, and after watching numerous youtube videos I went with the 22" in fear of the drone. I was expecting to hear more of a difference when accelerating over stock, but I'm still early in the break in process. I've noticed a slight drone around 1500 rpms, it's not bad and could go away over time.

Excellent Muffler

Reviewed by David B (Raleigh, NC) Reviewed for a 2012 Chevy Silverado — Jun 29, 2016 11:32 AM

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Magnaflow mufflers in my opinion are the best choice in every category. Nice looking, superb quality, long lasting, and the perfect deep tone. No hollow beer can resonance like some of the competitors. I have used the large body Magnaflow muffler on numerous SUV's & truck's and have never been disappointed. The large body (12588) also eliminates the drone effect in newer vehicles with AFM cylinder drop. Great muffler...highly recommend!


Reviewed by Eric S (TUCSON, AZ) Reviewed for a 2013 Dodge Ram — Oct 21, 2015 8:01 PM

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Sounds fantastic. Not too loud,

Perfect Muffler for the Hemi over 25.

Reviewed by Jim D (HOUSTON, TX) Reviewed for a 2012 Dodge Ram — Jun 01, 2015 9:34 PM

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I wanted to add more of a low tone but I didn't want to have drone when the MDS kicks in. Replaced my stock muffler with this 12588 one 3" in dual 2.5" out and I can't be more happy. NO drone at all. I left the resonators in place. Great muffler for the ones that don't want to set off alarms but likes a little rumble.


Reviewed by Louis G (Avella, PA) Reviewed for a 2014 Dodge Ram — Jul 17, 2014 10:53 PM

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4 of 4 people found the following review helpful.

After spending some time and internet forums and youtube listening to videos and getting feedback, I decided that this Magnaflow muffler was one of the best choices for my Dodge Ram 1500. It is a high quality product and and happy with the sound. Good muscular sound without being overly loud just for the sake of being loud.

Made my truck sound like a truck.

Reviewed by Joshua R (HERMITAGE, TN) Reviewed for a 2011 Chevy Silverado — Mar 16, 2012 9:26 AM

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11 of 12 people found the following review helpful.

I put the Magnaflow 12588 on my 2011 Silverado and man does it sound amazing. Great low rumble, hardly any cab drone whatsoever. My wife hasnt complained one time. I have 2 neighbors that have flowmasters and they said the cab drone was driving them crazy. They both have already ordered the Magnaflow to replace. Great sounding muffler. Plus, about an extra MPG at the pump.

Magnaflow Performance Mufflers - 12588

Center Inlet / Dual Outlet - Oval Muffler
  • $131.69
  • 1-Year Lower-Price Guarantee
  • Free Shipping
  • Ships By 8/20


  • Part Size:
    3.00" inlet/2.50" outlet, 5" x 11" x 22" body
  • Color:
  • Part #:
  • MagnaFlow Part # 12588
  • Center/Dual
  • 5" Body Height
  • 11" Body Width
  • 22" Body Length
  • 28" Overall Length
  • 2.5" Core Diameter

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