Flowmaster Muffler Comparison Guide

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We all know mufflers, well… muffle, but the differences between them are far less obvious. Which ones make the best sound? Which have the best blend of performance and heart-pounding tone? And that’s all assuming you actually want your exhaust to make a bunch of noise. Because for every Saturday night cruiser and parking lot revver, there’s a calm commuter or sinister sleeper packing a performance muffler that hardly makes a sound.

Whichever type you are, Flowmaster has you covered. From imports to domestics, trucks to cars, diesel to gasoline, Flowmaster mufflers have graced them all. It’s one of those brands people tend to associate with loud noises, but like finding out that Zippo makes more than just lighters, Flowmaster isn’t all about adding sound. In fact, they have several different muffler families with applications to suit any car and any driver.

Let’s compare the most popular Flowmaster mufflers to answer the following questions:

  • Which Flowmaster muffler sounds best?
  • What is the loudest Flowmaster muffler?
  • How does one compare the Flowmaster Super 40 vs Super 44?
  • What’s the difference between the Flowmaster Super 10 vs Super 44?

Scroll to the end for a Flowmaster muffler chart that organizes Flowmaster loudest to quietest.

It’s important to note that we’re not covering every system Flowmaster offers. Options like the 80 series, 50 series HD and DBX may be better suited for your needs. There are also specialty mufflers, like ones designed with towing in mind. We’re going to stick with the most common Flowmaster mufflers that fit a wide variety of vehicles, starting with the quietest and working our way up.

Flowmaster Super 50 Series

Flowmaster Delta 50 Series

Looking for a performance growl without a scowl from your neighbors? Well, look no further than 50 Series Delta Flow. Think of it as a Super 50 with a bad attitude. Where the Delta differs from the Super is volume – Flowmaster Delta 50 mufflers have a similar three-chamber design to the Super 50, but with a thinner case and more baffles for added resonance, helping the Delta 50 create a little more noise that’s easier to activate.

Flowmaster Pro Series

Popular in the diesel community, the Flowmaster Pro Series muffler stands apart with its laminar flow design. Picture two mesh cones wrapped in ceramic material, touching tip to tip – that’s about all there is to it. No baffles to restrict flow, no fiberglass packing to blow out over time. That ceramic layer helps keep temperatures down, meaning this muffler can be mounted in tight spaces where heat is a concern. The Pro Series has what could be called a moderate sound. It’s stronger, deeper, and more present than a 50 Series.

Note: Droning is likely beyond this point in the Flowmaster lineup.

Flowmaster Delta 40 Series

Flowmaster Super 40 Series

Flowmaster 40 Series

Flowmaster Super 44

Flowmaster Super 10

Flowmaster Outlaw MufflerFlowmaster Outlaw

We’ve reached the pinnacle. The Outlaw is the loudest Flowmaster exhaust currently available. It’s pretty much a straight pipe inside, so it’s only suitable for race applications – unless you’ve got the cajones to rock one on the road. Run a Flowmaster Outlaw on your tubbed-out supercharged Nova and deafen the crowd at the local dragstrip. Or the local mall, it’s up to you.

How do I choose the best Flowmaster muffler?

As we have now seen, Flowmaster offers mufflers for a wide variety of needs. It’s important to note that any existing modifications and your car’s overall condition can completely change the sound and either enhance or restrict the performance provided by the muffler. Check out forums, groups, and videos and ask around at car shows to find the one that’s best suited for your needs.

Just remember to be realistic when choosing a muffler. It’s easy to lose horsepower by bolting an expensive “racing” exhaust on a stock engine. Instead, choose a muffler that’s designed to make the most of what you have. The power gains will surprise you.

Can I see a Flowmaster sound chart?

Flowmaster Muffler Compare Chart

Of course you can! This handy Flowmaster chart is a Flowmaster muffler size chart and Flowmaster muffler sound chart. Check out this Flowmaster muffler sound comparison, then shop the most popular Flowmaster mufflers for sale on AutoAnything. 

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Mike Cote
I'm on off-road enthusiast behind the wheel of a perpetual project 4x4 Tacoma. I like to play in the rocks, but won't shy away from fast runs through the desert. My passion came from my dad whose had me in and around cars for as long as I can remember.

22 COMMENTS

  1. What is the least droning flow master muffler for a 2018 Chevrolet Impala with 3.6 engine? One that doesn’t sound like a really sick 6 cylinder engine. Thanks

    • Hey Dan,

      If you take a look at this chart here, you can see their mufflers sorted by volume and how much interior resonance or drone there will be. I would say you would be safe with a 50 Series Delta Flow, or a 70 series if you want to keep things more mild but still have a little bit of a growl to it. If you want to lean more aggressive, I wouldn’t go higher than an HP2.

      Flowmaster sound chart

      Hope this helps!
      Garrett

  2. hello, could you recomend a flow master muffer for a 2020 Dodge Challenger R/T Scat Pack with a 392 V8 VB SRT HEMI MDS Engine (485 Horsepower / 470 lb.-ft of Torque). I want it to sound like a muscle car but still be able to talk in car.
    thanks, bob

    • Hey Bob,

      I think a good option for you would be the Flowmaster Delta 50 HD. It definitely will pack that muscle car sound, but won’t wake the neighborhood or drone out any hope at a conversation on the freeway. If you want something a little more aggressive, but still not obnoxiously loud, then the FlowFX is a good choice as well, but that would be as aggressive as I’d go.

      Cheers!
      Garrett

  3. What Is the best muffler for a Dodge Charger 2019 sxt with a v6 Engine? I want it to sound good but not to loud on the inside where I cannot hear conversations on long trips.

  4. Hi been doing alot of research i have a 2016 ram 1500 crewcab 5.7 hemi i wanted the super10 and heard a video and the drone seemed really bad. I want this muffler to make my truck loud though i heard another video of the super44 and it seemed to quiet. Based on the chart the 44 is louder than the original 40. I was leaning towards the original 40series i am keeping my stock dual pipes and keeping resonators on does anyone have any suggestions? I want to be able to hear the rumble from inside my house when i start it. Thanks for any help

    • Hey Dave,

      It’s really hard to tell how loud different mufflers and catback systems are in video, especially to gauge drone. The Super 44 is pretty loud, I had one on my Wrangler. It also had more drone than I really wanted. I think the original 40 is a better pick, as it will still give you plenty of volume, but not wake up all the neighbors every time you start it up. I definitely don’t recommend the Super 10 for you, those are insanely loud and drone like crazy.

      Hope this helps!
      Garrett

  5. Hi looking for flowmaster on a 2020 gmc 1500 At4 6.2L. Definetly want the aggressive low growl but without the drown and less noise in the cab. The wife says she still wants to have a conversation with me. lol How would either the 4o series delta flow or the Super 40? Would the 50 delta not be enough for what I am looking for?

    • Hey Christian,

      In my experience I would say the 40 series can be a little aggressive in terms of drone and being able to have a conversation — especially with the Super 40. I would say a 50 series or HP2 would be the way to go. They’ll give you the growl you want, especially under load, but aren’t so harsh on the drone or vibration into the cabin. The 50 series Delta Flow is one of my favorite recommendations, as it gives a good rumble when you want it, but is never grating at freeway cruising RPMs.

      Hope this helps!
      Garrett

  6. Any recommendations for a 1997 Chevy Suburban C2500 7.4L V8 Big Block 454? I would like it to be as loud as possible while still being able to talk to my son in the 2nd row on the highway. Thanks in advance!

    • Hey Mitchell,

      I’d say a Flowmaster 40 Delta Flow or Super 40 would be about as loud as you would want to go while being able to talk still on the freeway.

      Cheers!
      Garrett

  7. I have a 2020 Dodge Ram 1500, Hemi. I would like to remove the stock muffler and replace it with a Flowmaster. I have heard that they are bad on drone and would like to keep the quietness of the cab but at the same time give that distinct Flowmaster sound. What do you think would be my best bet? I just want it to sound different than stock.

    • Hey Brian,

      If you’re looking to get a good sound without drone on the highway, I would stick with something in the range of the 50 series Delta Flow. That will give you that deep sound without the grating drone, and won’t be too loud.

      Cheers!
      Garrett

  8. got a dodge ram 1500 sport 2017 curious what I should get for my truck! I was looking at the flow master super 44 or outlaw, are my top 2 but was also looking at the super 10 .. im stuck in a bubble on which to get

    • Hey Johnny,

      Those are good choices if you want it to be loud and aggressive! I would go for the Super 44 of those two. If you want it still loud but not quite as aggressive, the regular 40 is a good choice, and then 50 or 50 Delta flow for something more mild.

      Cheers!
      Garrett

  9. hello. I am glad that you reply. I have a 2020 gmc sierra at4 6.2. I am tossed between a super 50 and a delta flow 50. I like outside noise but want it quiet in the cab. how do they differ.

    • Hey Jeff,

      The Delta Flow 50 is a little more aggressive while the super 50 is more on the mild side. Neither will be a problem as far as drone is concerned, if you want it to be a little more aggressive on the outside, I would definitely go with the Delta Flow.

      Cheers!
      Garrett

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