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Flowmaster Super Flow 44 Series Offset/Offset Oval Muffler - 2.5 in. (Universal Fitment)

Item 18400
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Market Price $96.99 You Save 12% ($12.04)
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$84.95 (each)

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Ship to: Ashburn - 20149
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    Features & Details

    • Signature Flowmaster Sound
    • Two Chamber "Gen II" Delta Flow Technology
    • Offset Inlet and Outlet Design
    • 2.5" Inlet/Outlet Diameter
    • Aluminized Steel Construction
    • Sold Individually
    • Universal Fitment; Modifications Will Be Required
    That Flowmaster Sound. Improve your Mustangs exhaust flow for an increase in horsepower and a deeper throatier exhaust note with a set of Flowmaster Super Flow 44 Series Mufflers for a truly classic muscle car sound.

    Superior Design. The Flowmaster Super 44 Mufflers are MIG welded from durable 16 gauge aluminized steel for durability and value. The 44 series mufflers use Flowmasters patented two chamber "Gen II" Delta Flow design to increase power and sound. And each muffler is embossed with the "Flowmaster" name so you know it is the real article.

    Modifications Required. This Muffler was designed to be used on mutliple applications, as it is not a direct fit replacement part. In order to install this Muffler properly on your vehicle, some modifications to the exhaust system will be required.

    Application. The Super 44 Muffler's outer case measures 4" x 9.75" x 13", and features a 2.5" diameter inlet and outlet in an offset configuration. This is the perfect muffler for the 1979 to 2004 Mustangs. Excludes 1999-2004 SVT Cobra.

    Fitment: 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 Details

    MPN# 942548

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) Muffler
    Installation Info
    Tech Specs
    40 Series Delta Flow versus 40 Series Original versus Super Flow 44 Series
    • Minimizes interior resonance
    • Aggressive exterior tone
    • Two Chambered Muffler
    • Made of Aluminized Steel
    • No minimization of interior resonance
    • Aggressive tone inside and out
    • Two Chambered Muffler
    • Made of Aluminized Steel
    • Delta Flow technology minimizes interior resonance
    • Aggressive deep powerful tone
    • Two Chambered Muffler
    • Made of Black Aluminized Steel
    Will it fit my Mustang?
    • Bullitt - 01
    • Cobra - 93, 94, 95, 96, 97, 98
    • Cobra R - 95
    • GT - 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04
    • LX - 87, 88, 89, 90, 91, 92, 93
    • Mach 1 - 03, 04
    • Other - 79, 80, 81, 82, 83, 84, 85, 86
    • V6 - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04

      Customer Photos (17) Submit Your Photo

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        Questions & Answers (26)

        5 Top Rated Questions

        yes or no for a Flowmaster muffler on a v6 i just bought a 2002 mustang v6 and i want it to sound louder then it is now , i took the car to a muffler shop and the guy said he wouldnt suggest it because it would sound weird on a v6 , is there any other product or suggestions any one has ? please and thank you

        • that what i install on my 2000 v6 and it give a very hot sound my friend who got a 2010 v8 said its almost the same thing so for the price it very good.

        Helpful (29) Show 4 more answers

        Is an X-Pipe necessary? I want to improve the sound of my GT. In a perfect world I would get both a Xpipe and new mufflers but I cant afford both of them at the same time. I know an Xpipe would really help the sound and airflow but do I need to buy the Xpipe first? Could I not just get these mufflers welded in at the local shop with my stock catted h pipe? And lastly would the interior drone be any worse if I didn't have the Xpipe. I want better sound on the exterior and NO DRONE. Thanks

        • I would recommend having the stock mufflers cut out , and weld the new 44 mufflers in , if your on a budget .. Once u have thats done see how u like the sound from there , u will get a deeper tone from the 44 mufflers very low drone .. If u want more of an aggressive deep tone I recommend an H pipe, if u want a higher pitch racey sound then the X pipe will do the job :-)

        Helpful (8) Show 4 more answers

        I am debating or which mufflers to get the 44 series or classic 40 series, I want my mustang to sound like deep, strong roar but at the same time i don't want to loud where I cant enjoy my driving , please help which mufflers will give that perfect muscle sound !

        • The 44 series has nicest rumble at lower rpms. It's never too loud at highway speeds, but does tend to resonate somewhat depending on the rpm range. I've tried all the favorites and this sounds the best. Headers, and larger diameter exhaust tubing help a great deal more for a serious rumble. All mufflers are somewhat restrictive by the very nature of their design. So that 'sound' you're hoping for will probably require more than just the 44's.

        Helpful (2)

        Will these mufflers pass a smog in california?

        • While mufflers do not generally affect smog inspection, the Flowmaster Super Flow 44 Series Muffler does not have a CARB number and may not pass an emissions check in California.

        Helpful (1)

        Are these legal in California?

        • At this time we do not have a decibel reading for this muffler, and thus cannot confirm legality in California.

        Helpful (0)
        10 More Questions
        Will these give an '04 V6 a raspier or a deeper sound? 1 answer
        Can i find this in a cat back exhaust setup for my o1 mustang gt? If not, then can someone help direct me to where i can find the bent exhaust for my car to go with these mufflers? 1 answer
        Will this fit a 2011 V6. Some reason it says it won’t on my side but it have universal fit also by it 1 answer
        08’ mustang V6 4.0 L, will it work and will it affect power and gas? 1 answer
        I measured the Length of the stick mufflers and the supper 44’s, will I have to buy extra piping? The 44s are a little shorter than the stock mufflers, from my measurements at least. 1 answer
        Would this fit on 2016 V6 mustang? If not what other product would be similar that could be recommended? 1 answer
        So I purchased these mufflers already and have the Pypes off-road H-pipe installed already but not the mufflers yet. Will these mufflers make my stang louder? The o/r h pipe along with the stock mufflers a pretty loud but you gotta get on the throttle to wake it up. Below 2k rpm it isn't loud much. Will these make it louder? 1 answer
        Hello, i have a 2003 Mach 1 with Flowmaster series 40 on it, will improve the sound if i get the series 44? thanks 1 answer
        I have a 99 V6, will I need to get different tailpipes if I switch the muffler or will it be fine with the stock one just welded on? 1 answer
        Hello, Can I put this on my 2003 V6, single exhaust to make it a little louder and more powerful? thank you 1 answer

          Customer Reviews (100+) Write a Review

          Ratings Summary

          4.7 out of 5 overall rating from 100+ customers

          Installation Time: Full Day

          Installation Cost: $100-$250

          • January 06, 2020

            4 2003 GT - Gt03 Installation Time: Shop Install

            Not as Expected

            Had to replace the stock mufflers and decided to be cheap and buy these mufflers. There was a slight difference, would rather buy SLP Loudmouths

            Helpful (0)
          • November 10, 2019

            4 2000 V6 - MrMustang Installation Time: Afternoon

            It's a Mustang Thang

            Not quite the sound l wanted but great for a v 6 mustang

            Helpful (0)
          • October 30, 2019

            5 2000 V6 - Rico2000 Installation Time: Less than 1 Hour

            Super 44 Series

            This is one of my first mufflers Ive bought ,great sound.

            Helpful (0)
          • October 29, 2019

            5 2005 V6 - Caleb17


            This muffler is very good and has a nice sound to it.

            Helpful (0)
          • October 23, 2019

            5 2002 GT - GTStang336 Installation Time: Less than 1 Hour

            Flowmaster Super 44

            Muffler sounds great and aggressive. Shipping was fast and overall pleased with purchase

            Helpful (0)
          • September 29, 2019

            5 2000 V6 - flowmaster Installation Time: Less than 1 Hour


            I spent hours looking for the right muffler. And finally I came across the super 44’s. Couldn’t be happier.

            Helpful (0)
          • March 12, 2019

            1 1989 GT - EricF

            Flowmaster supper 44.

            There is not much of a difference from the stock muffler. I honestly expected more of a aggresive sound. It also gives a little of a rattle. The mufflers my mustang had before did not make that rattle noise.

            Helpful (0)
          • November 12, 2018

            5 2003 Mach 1 - BayAreaMach1 Installation Time: Shop Install Installation Cost: $100-$250

            Sounds Amazing

            Nice deep sound, i paired this up with a bessani x pipe.

            Helpful (4)
          • October 24, 2018

            5 1992 GT - DeonK Installation Time: Less than 1 Hour


            Can hear the cam a bit more at idle compared to the original 40s. Slightly louder as well exhaust note isn’t very different but I’d say I still love the sound even more

            Helpful (4)
          • October 02, 2018

            5 2002 GT - JohnW

            Very Pleased

            I’m very pleased with these mufflers, they give my car the sound I was looking for.

            Helpful (5)
          • September 19, 2018

            5 2003 Mach 1 - RobertC Installation Time: Shop Install Installation Cost: 0-$100

            Exhaust upgrade to 03MACh1

            I bought the Flowmaster Super 44 series for my 03MACh1.the stock mufflers were stuffed up..... SOUNDS GREAT... RUNS EVEN BETTER...

            Helpful (4)
          • July 25, 2018

            5 1992 GT - ChrisL Installation Time: Shop Install Installation Cost: 0-$100

            Flowmaster Super Flow 44 Series

            Just got back from getting these installed. OMG in love the deeper sound is just mean. So happy with with these mufflers. Would highly recommend to anyone looking to buy.

            Helpful (6)
          • July 02, 2018

            3 2002 V6 - JamesW Installation Time: Shop Install Installation Cost: $100-$250

            super flow 44

            exhaust note could be a little louder but decently pleased

            Helpful (6)
          • April 06, 2018

            5 1996 GT - CharlesM Installation Time: Less than 1 Hour

            Flowmaster 44's Sound Great

            I put these on my 1996 Mustang Gt (stock). Go with the 2.25 for perfect fit to stock exhaust. The 44's sound great, made my mustang sound like a Mustang. Deep Growl, not obnoxious. Sound really good under load. Definitely a lot better sound that stock.

            Helpful (8)
          • February 15, 2018

            5 1996 Cobra - AMMO69 Installation Time: Afternoon


            Kick-butt compared to my Magnaflow mufflers. Nice blub-blub. Not TOO loud.

            Helpful (12)
          • January 03, 2018

            3 1994 GT - EdR Installation Time: Shop Install Installation Cost: 0-$100

            Not as loud as I expected

            I was hoping for more rumble in Idle, but it seems to be more louder from 1st thru 4th gear, overall i give it a 3 under what i expected.

            Helpful (8)
          • November 30, 2017

            4 1999 GT - Boomie Installation Time: Less than 1 Hour

            Super Flow

            I added these to my 99 GT they gave me the sound i was looking for without going over the top. You can really hear the difference when you hit the gas. Happy with my purchase.

            Helpful (8)
          • November 05, 2017

            4 1999 V6 - Stanglover Installation Time: Shop Install Installation Cost: $250-$500

            More aggresive

            It made an increase sound difference, fits well, only thing is that it doesn't have that constant sound that I hoped for. All in all, its a great quality piece that makes my car more aggressive sounding and fools people into believing its a GT.

            Helpful (9)
          • November 03, 2017

            5 2000 GT - DarinB Installation Time: Afternoon

            Satisfied customer

            I recently ordered the Flowmasters super 44 series and I'll tell you what they give my Mustang GT the rumbling sound that I always wanted sounds like a vicious muscle car not bad for a $86 a piece can't wait to buy more products

            Helpful (9)
          • November 02, 2017

            5 2001 GT - eman Installation Time: Shop Install Installation Cost: 0-$100

            super 44's

            Great muffler, sounds great, car runs a little better than the old 40s flowmaster.

            Helpful (8)

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