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Flowmaster Super Flow 44 Series Offset Muffler - 2.5 in. (79-04 All, Excludes 99-04 Cobra)

97 Reviews
Our Price


  • Item #18400
  • MPN #942548
  • Market Price $93.99
  • You Save 11% ($10.09)
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Product Videos Customer Photos
  • 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
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.

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.

Mustang 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

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
  • Bullitt - 01
  • Foxbody - 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93
  • Mach 1 - 03, 04
  • V6 - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04
  • Cobra - 94, 95, 96, 97, 98
  • GT - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04

Most Helpful Reviews View All

Overall Rating 4.8/5 Write a Review

Awesome muffler that adds great sound & power. If your 'stang is bone-stock like mine was then this is the perfect item to start with to give it the muscle it deserves.

Helpful (16) (1)

single v6 muffler

ok i installed this super 44 muffler along with a bbk cai and the sound is instant. at about 2k is when it gets more agressive and for a single exhaust this is the cheapest and best sound. overall a great

Read More
Helpful (23) (4)


Customer Photos (15) View All

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Q & A (9 Questions, 15 Answers) Ask a Question

What do i have to do to install this? do i need to go to a shop, or can i do it all in my garage w/ a few jacks. All my exhaust is completly stock, will i need anything else as well?

03AndrewP Year: 2003 Model: V6

Question Resolved
Good Question (0) (0)
  • Your best bet would be take them to a shop, because they require welding. and plus it is just a lot easier and way less of a hastle. I spent $50 getting mine installed.

    Helpful (1) (0)

    Best Answer

    Hewitt Year: 2000 Model: GT

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

Parker Year: 2002 Model: GT

Question Resolved
Good Question (8) (0)
  • 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 (10) (0)

    Best Answer

    gmsmoker41 Year: 2002 Model: GT

    Top 50 Contributor

Show 4 more answers

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

ausitnb Year: 2002 Model: V6

Question Resolved
Good Question (29) (0)
  • 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 (5) (0)

    Best Answer

    rickyboy69 Year: 2000 Model: V6

Show 4 more answers

Reviews (97) Write a Review

  • 5 Stars .87 87%
  • 4 Stars .09 9%
  • 3 Stars .04 4%
  • 2 Stars 0 0%
  • 1 Stars 0 0%

out of 5 stars

94 Customers Recommend this Product

Installation Time:Full Day

Installation Cost:$100-$250

  • Loudness / Volume: 4.428571 4.4/5
  • Exhaust Note: 4.829268 4.8/5
  • Fit & Finish: 4.690476 4.7/5
  • Bang For Your Buck: 4.714286 4.7/5
Filter By Sort By
  • 5/5

    single v6 muffler

    July 23, 2010

    ok i installed this super 44 muffler along with a bbk cai and the sound is instant. at about 2k is when it gets more agressive and for a single exhaust this is the cheapest and best sound. overall a great product and would reccomend it.


    Helpful (23) (4)

  • 5/5


    May 22, 2010

    Awesome muffler that adds great sound & power. If your 'stang is bone-stock like mine was then this is the perfect item to start with to give it the muscle it deserves.

    Bryan Carduff

    Helpful (16) (1)

  • 5/5

    Amazing sound

    November 30, 2010

    I put these along with a jegs off road h pipe and a CAI on my 97GT and it sounds so awesome. Loud and quality. It may be a little biased, but I think I have the meanest sounding mustang around. Everytime I start it up I just smile.


    Year: 1997 Model: GT Driving Style: Daily Driver

    Helpful (14) (1)

  • 5/5

    perfect rumble

    August 16, 2009

    These sound great! Nice and loud through the first 3 gears then they quite down around 4rth and 5th gear for highway cruising. Also have an awesome rumble at idle!


    Helpful (18) (3)

  • 5/5


    May 29, 2010

    always thought flowmasters were quiet. but no way i get compliments all the time. recommend these big time and an o/r h pipe really sets them off!!

    Jeremy Eckert

    Helpful (12) (1)

  • 5/5

    Recommended for any Mustang GT or V6

    October 19, 2010

    Took these mufflers to my local exhaust shop and had them put these on with an h-pipe. I'm not going to say that it made my v6 sound like a Gt but it's pretty dang close. I'm very impressed with the sound and quality of the product. If you want the muscle sound your mustang deserves definitely pick the mufflers up.


    Driving Style: Daily Driver

    Helpful (10) (1)

  • 5/5


    September 22, 2010

    I bought these mufflers for my '04 Gt. I was almost dissepointed right after the install because they just didn't sound to good.. but I knew they needed to be broken in. over the course of about 3 weeks(420 miles), they finally broke in. Now they sound absolutely AMAZING! Thanks AM!


    Year: 2004 Model: GT Driving Style: Daily Driver

    Helpful (17) (5)

  • 5/5


    August 02, 2010

    theres nothing like the sound of a flowmaster and thease 44s r the best ive found yet. when i first put them on i thaught there they soundedd great but but just not quite enugh ring to them i drove it for about a week and a half and one day they finly broke in and woke up the sound was then perfict i still go out on a random drive just to hear the sound. and my bassani o/rX realy helps as well. american mucle is the greatest place posible to buy aftermarket mustang parts love it.


    Helpful (10) (2)

  • 5/5

    '04 Mustang with Set of 44's

    June 25, 2010

    I had a chance to get a pair of these installed on my Mustang and they sound great. I especially love the sound at around 2K RPM's just like Noel said. Sounds very aggressive and the price was right with these mufflers. I also have a JLT Cold Air Intake which adds a little more cackle to the exhaust when you let off which makes it that much more enjoyable to drive.


    Year: 2004

    Helpful (9) (2)

  • 5/5

    signature FM rumble

    June 13, 2010

    these mufflers are really great! I got them welded on by a local muffler shop, because I don't have a welder. The difference is instantly noticeable. Like others have said, around 2K RPM's is where you hear the best aggressive sound. At idle a deep rumble. I highly recommend these 44's to anyone wanting to improve the sound of their GT.

    noel r.

    Helpful (9) (2)

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