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Flowmaster Super 10 Series Offset/Offset Oval Muffler - 2.5 in. (Universal Fitment)

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Market Price $91.99 You Save 13% ($12.04)
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$79.95 (each)

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  • Item 18432

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    Features & Details

    • Super Aggressive Sound
    • One Chamber Delta Flow Technology
    • Offset Inlet and Outlet Design
    • 2.5" Inlet/Outlet Diameter
    • 409s Stainless Steel Construction
    • Intended for Off-Road Race Use
    • Sold Individually
    • Universal Fitment; Modifications Will Be Required
    Super Aggressive Flowmaster Sound. Improve your Mustangs exhaust flow for an increase in horsepower and a deep aggressive exhaust note with a set of Flowmaster Super 10 Series Mufflers. These mufflers are so loud they are only recommended for off-road race use.

    Superior Design. The Flowmaster Super 10 Series Mufflers are MIG welded from durable 16 gauge 409s stainless steel for durability and value. The 10 series mufflers use Flowmasters one chamber delta flow design to increase power and sound. 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 10 Series Muffler's outer case measures 4" x 9.5" x 6.5", 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# 842518

    CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

    What's in the Box
    • (1) Muffler
    Installation Info
    Tech Specs
    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 (19) Submit Your Photo

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        Questions & Answers (25)

        5 Top Rated Questions

        is this a direct replacement muffler? I would like to know if this is a direct replacement muffler or will there have to be some modification in order for it to fit. I have a 2000 V6 and I am looking for something with a "deep" tone and not a "loud" one.

        • Some slight modifications will be needed to install these mufflers due to the difference in length over the stock mufflers. I am sure the results you are looking for will be surpassed with these great set of mufflers.

        Helpful (6) Show 3 more answers

        With the flowmasters 10 series does it backfire when you let of the gas?

        • Back fire is not the correct word for it, but it does have the "popping" effect when it is dropping rpm.

        Helpful (2) Show 1 more answer

        is this the loudest flowmaster muffler?can i use this on the street?will i lose hp or gain hp?

        • These are the loudest chambered muffler Flowmaster sells. As the description states on the American Muscle site, they are intended for off-road use only, but as you and many of us know these are just disclaimers they must make. You can run straight pipes, as long as you think you can get by the police! ;-) These should give you a very aggressive sound, plus the better HP gain. Just be careful who is watching you when you hammer on that Mustang! Be sure to post up a sound bite after you install them.

        Helpful (1) Show 5 more answers

        what is the difference between this offset/offset super 10 muffler and the offset/center super 10 muffler? sound? hp? flow?

        • The difference between the two is where the openings are located on the muffler. The offset/offset will have both openings not directly in the middle, while offset/center will have one opening in the center while the other will be off to the side. This will depend on how your system is set up underneath.

        Helpful (0)

        I may sound dumb, but are these street legal in California?

        • With California's new exhaust laws, we recommend checking with a shop or your state ordinances to confirm if this is legal or not.

        Helpful (0)
        Post Your Question
        10 More Questions
        this is a dumb question... but would this damage a stock car?? have a 02 GT that is stock, with H pipe and would like to put these on. Would it harm the engine??? cats would still be on and so on, just wanting a bit more sound. If I put these on should I have the car tuned?? 1 answer
        I purchased the pypes street pro catback exhaust off yalls website and I am really interested in these mufflers. I am looking for a really loud head turning sound and I was wondering what I would have to do to put these mufflers on the pypes street pro catback exhaust and how loud would it be ? 1 answer
        I purchased the pypes street pro catback exhaust off talks website and I am really interested in these mufflers. I am looking for a really loud head turning sound and I was wondering what I would have to do to put these mufflers on the pypes street pro catback exhaust and how loud would it be ? 1 answer
        Will these give an '04 V6 a raspier or a deeper sound? 1 answer
        I have a 2003 V6 Mustang, will this make my car too loud for daily driving? I know it says it's not recommended for that, but my V6 is weak sounding already, so will it really be too loud even with a weaker engine? 1 answer
        I have a 03 V6 stang and I want that deep sound when driving but don't want them to be extremely loud when driving around as it is my daily. Should I get these or the Flowmaster 40 Series? 1 answer
        Do the super 10 offset/offset oval muffler come in a 3.in.? 1 answer
        I How have pypes violators wondering how these compare in tone, aggression and overall loudness 1 answer
        I have a Roush side exhaust setup right now with MagnaFlow mufflers. My question is will I be able to use thesearch mufflers because my current mufflers have the inlet and outlet on the same side. Thanks in advance 1 answer
        Can someone please link me to the 3 in. model? A rep showed me but I lost the link 1 answer

          Customer Reviews (86) Write a Review

          Overall Rating 4.8

          out of 5 stars

          Installation Time:Full Day

          Installation Cost:$100-$250

          • Loudness / Volume 4.433735 4.4
          • Exhaust Note 4.614458 4.6
          • Fit & Finish 4.795181 4.8
          • Bang For Your Buck 4.722891 4.7



          • 4/5

            Installation Time: Afternoon

            March 11, 2019

            Nice Sound

            I had an american thunder axle-back ans swapped the mufflers out for these hoping for a louder and deeper sound. Overall I got a deeper rumble especially at idle, but not much more volume, I do have all four stock cats though. Went in and welded nicely, just a bit quiet for me.

            sa

            Year: 1997 Submodel: GT

            Helpful (0)

          • 5/5

            Installation Time: Afternoon

            January 30, 2019

            The best

            Incredible agressive sound, feel good, betther performance

            SergioV

            Year: 1995 Submodel: V6

            Helpful (2)

          • 5/5

            Installation Time: Less than 1 Hour

            January 27, 2019

            Loud!!!

            The loudest muffler flowmaster makes, definitely has that rumble that everyone loves. Couldn’t be happier with them!

            Earnest4426

            Year: 1996 Submodel: GT

            Helpful (4)

          • 3/5

            Installation Time: Shop Install

            Installation Cost: 0-$100

            January 26, 2019

            limited sound

            Disappointed in sound level. Had flowmaster 40. Could not tell difference.

            SamR

            Year: 2004 Submodel: GT

            Helpful (3)

          • 5/5

            January 03, 2019

            Just awesome

            Had these mufflers installed on my 2010 mustang gt welds in place of stock muffler and lines up with exhaust opening on valance. Sound is amazing even with stock mid pipes.

            RusselG

            Year: 1994 Submodel: GT

            Helpful (4)

          • 5/5

            Installation Time: Less than 1 Hour

            October 31, 2018

            Best mufflers out there

            They give your Mustang that classic Mustang sound. Love flowmaster

            MichaelL

            Year: 1988 Submodel: GT

            Helpful (3)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $100-$250

            September 07, 2018

            10/10

            Has a nice rumble to it I’m sure once I get an x pipe it’ll make the car even louder! Will update sound soon.

            TC

            Year: 2003 Submodel: V6

            Helpful (4)

          • 5/5

            Installation Time: Afternoon

            September 03, 2018

            Amazing

            When I bought the car it had Flowmaster 40s on it, these made it sound amazing it’s not to much louder at idle but when you get on it that’s when you notice the the difference, the only issue I have with them is I found a factory defect in the one weld so I had to reweld it so it wouldn’t leak but other than that the sound quality is amazing you won’t be disappointed

            MichaelH

            Year: 1994 Submodel: GT

            Helpful (3)

          • 5/5

            Installation Time: Less than 1 Hour

            August 23, 2018

            Great sound

            I have a 1995 mustang gt no cats and a h-pipe put these bad boys on they can get really loud I highly recommend getting these mufflers they sound really good and you can get them for a good price

            MasonS

            Year: 1995 Submodel: GT

            Helpful (2)

          • 5/5

            Installation Time: Full Day

            May 24, 2018

            Awesome!

            Love the sound of these mufflers. They have a nice aggressive tone and are not overly loud inside the car. Also, I went from the super 44's to these 10's and let my say, I am glad that I did.

            JasonP

            Year: 1998 Submodel: GT

            Helpful (10)

          • 5/5

            Installation Time: Afternoon

            May 16, 2018

            Smile on your face every time

            I bought these mufflers for my 88 mustang gt along with a set of 2.5 flowtubes. The install was simple because I use the turn down method and cut the old exhaust tips off for the turndowns. Also, I bought universal exhaust hangers to complete the install. Don’t second guess yourself. If you like aggressive, loud, in your face, hear me mufflers these are those!

            DewayneWest

            Year: 1988 Submodel: GT

            Helpful (9)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $100-$250

            February 26, 2018

            Super 10 very nice

            Noticeable difference in sound, straight piped with 2 super 10s equal loud

            Hodge

            Year: 1996 Submodel: V6

            Helpful (7)

          • 4/5

            Installation Time: Less than 1 Hour

            February 25, 2018

            It’s pretty good

            Well I originally had my mustang straight piped so it was really loud and read comments about how it made it deeper so I got it and got it on and it did make it deeper but made it really quiet compared to straight piped but it still is definitely louder and deeper than the original muffler that was first on it.

            JacobH

            Year: 2004 Submodel: V6

            Helpful (6)

          • 5/5

            Installation Time: Afternoon

            February 19, 2018

            sounds great!

            Purchased this product and she sounds amazing! Easy to install. It took me about an hour give or take. they are loud and have a nice muscle car tone to them! I would recommend these if you are trying to get heads to turn from a distance.Thanks American Muscle!

            StevenP

            Year: 1989 Submodel: GT

            Helpful (7)

          • 5/5

            Installation Time: Afternoon

            December 15, 2017

            Flowmaster Super 10

            Took a chance with Flowmaster for the first time and they actually sound great! My mustang sounds mean so I’m happy with my purchase

            Durrance1996

            Year: 1992 Submodel: LX

            Helpful (6)

          • 5/5

            November 17, 2017

            muffler

            Exactly what I was looking for, with sound and fit

            SteveR

            Year: 1998 Submodel: V6

            Helpful (9)

          • 5/5

            Installation Time: Less than 1 Hour

            November 04, 2017

            Hounding difference

            I got my super 10s in a day after I ordered and I’m glad I did. I still have the stock H pipe tho but it’s a Huge difference when I’m taking off and letting it slow down by itself. I hear sooo much more backfire now since I put these on and I love it.

            JeffreyS

            Year: 2000 Submodel: GT

            Helpful (8)

          • 5/5

            Installation Time: Less than 1 Hour

            October 30, 2017

            10 series Flowmasters on my 94 mustang gt

            I love the way my car rumbles now, it's exactly how I wanted it to sound! Couldn't be any happier!

            SarahB

            Year: 1994 Submodel: GT

            Helpful (5)

          • 4/5

            Installation Time: Less than 1 Hour

            July 31, 2017

            Super 10s

            Installed on my notchback 5.0. Jus the sound I was looking for. Wasn't as loud as I expected and must say I'm glad because I know the super 44s wouldn't have done it for me. Very satisfied with the super 10 purchase.

            RonnieA

            Year: 1988 Submodel: LX

            Helpful (6)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: 0-$100

            July 14, 2017

            Awesome

            Loud raspy sound but also a low deep growl my car sounds better than it looks amazing product.

            Tyler

            Year: 1994 Submodel: GT

            Helpful (9)

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