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Pypes M-80 Bullet Style Muffler (79-04 All)

Market Price $59.79 You Save 13% ($7.80)

$51.99 (each)

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  • Item 20108
  • MPN# MVR200S

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Features & Details

  • Aggressive Throaty M80 Tone
  • Straight-Through Design for Superior Flow
  • 4" Round Inline Design
  • 2.5" Inlet/Outlet Diameter
  • 304 Polished Stainless Steel Construction
  • Sold Individually
Aggressive M80 Sound. The M80 "Race Pro" muffler has a straight-through design that features a layer of stainless mesh around a unique internal 3.5" louvered tube, accompanied by a healthy stuffing of basalt insulation that results in an aggressive muscle car tone and an improved exhaust flow for more power.

Polished Stainless Steel Construction. Constructed from polished 304 Stainless Steel to resists rust and corrosion, the Pypes M80 Muffler features a round 4" diameter tubular bullet style casing that is welded closed to ensure a long life without any annoying rattles.

Application. The Pypes M80 Muffler's outer case measures 14" long and 4" round, it features a 2.5" diameter inlet and outlet in a straight inline configuration. Making this is the perfect muffler for the 1979 to 2004 Mustangs.

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
Will it fit my Mustang?
  • 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, 99, 01, 03, 04
  • GT - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04

Most Helpful Reviews


I had researched these mufflers on youtube and was in love ever since. I knew this was the exhaust my car needed to have! So i ordered them the next day from AM and wow did i receive them fast. I got them ...

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Helpful (3)

Pypes M80 on 2005 Mustang GT

well i had these installed on my 2005 mustang, im not a big fan of axle backs, when i first had them installed my setup was BBK long tube headers with an Offroad H pipe. the sound was really throaty not ...

Read More
Helpful (2)

Overall Rating 4.7 out of 5 stars
Read All 100+ Reviews

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21 Questions / 21 Answers

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Will these work with 1994 Mustang stock exhaust Hello, I have a 1994 Ford Mustang V6. I am hearing a lot about these mufflers, but that they only sound best with X-Pipes. If I have stock exhaust will these then sound bad or should I go for a different muffler? I did not want to get an obnoxious noise or popping because I did not have X-Pipes. Any clarity here? Thanks... :-)


  • Any muffler is better than the stock ones. these should be fine and I don't here a big difference if any at all with the X-pipes.


    Good Answer (0) (0)

Show 3 more answers Question Resolved

How would these sound as just a weld in with everything else stock? Don't want anything overly loud.


  • I have stock headers, stock midpipe, and the pypes M80's on my 88 lx. You wont be disappointed once you get them installed. I didnt want anything overly loud as well, just a low grumble. They sound really clean and healthy and your mustang wont sound overly obnoxious.


    Good Answer (2) (0)

Show 4 more answers Question Resolved

Does this muffler need to be welded during installation? Or can it just be clamped?


  • Most muffler installations require welding to keep stray exhaust gases from entering your vehicle cabin. Muffler installers always check for leaks as the last step in an installation.


    Good Answer (3) (0)

Show 3 more answers Question Resolved

Would these fit with the MAC dual exhaust conversion kit? I had recently purchased and had installed the MAC dual exhaust conversion kit on my 2003 3.8L V6. i was wondering if it would be possible to cut away the mufflers that came with the kit and weld in these bad boys?


  • Look at the installs of customer photos that are listed with this muffler description. It can be done, but you should run it by your muffler install shop for the best possible outcome. Some people replace the offset mufflers on their V8's with adapters while others just dump them underneath the frame without routing them to the rear bumper cover. It's your choice, but you must be willing to make some adjustments to make 'em work. Make sure it's the sound you want before switching out.


    Good Answer (0) (0)

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Good for Turbo mustangs? I have a turbo mustang gt and right now I have a chambered muffler and I want to go to a straight through design like this. Would these pair up well with a turbo car?


  • They will sound very different than what you're hearing now, but would work fine. If you like a higher pitched, raspy tone this is the way to go.


    Good Answer (0) (0)

Show 2 more answers Question Resolved

Will this muffler be able to be welded on directly to my stock 03 v6 or are other purchases necessary for it to fit?


  • This will work perfect to directly replace your stock muffler and really open up your exhaust.


    Good Answer (0) (0)

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Customer Reviews (100+) Write a Review

Overall Rating 4.7

out of 5 stars

Installation Time:Full Day

Installation Cost:0-$100

  • Loudness / Volume 4.446154 4.4
  • Exhaust Note 4.592308 4.6
  • Fit & Finish 4.615385 4.6
  • Bang For Your Buck 4.838461 4.8

  • 5/5

    Installation Time: Less than 1 Hour

    March 23, 2016

    Awesome Item!

    This thing sounded amazing on the 2003 V6 I put it on. It Gave my 3.9L a little more roar


    Year: 2003 Submodel: V6

    Helpful (1) (0)

  • 4/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    November 23, 2015

    Love the sound

    Installed on my 03 cobra, with BBK o/r xpipe and m80s, terminator sound the way it should! Free quick shipping thank you AM another great purchase.


    Year: 2003 Submodel: Cobra Liberty MO

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    August 01, 2015


    I bought this pypes and I wasnt sure about it but I drove my 2003 Mustang to the mechanic and the guy installed. The sound is amazing just right what I want it gives more style to my pony.


    Year: 2003 Submodel: V6 WORCESTER, MA

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    June 17, 2015

    Pypes M80's

    Ordered these after reading many reviews. I was really looking for some relief from the drone of the 2-chamber Flowmasters. Like many others who have reviewed here I will say these are definitely quieter at idle and light cruising. They come alive when you get on it! It's a very different sound than the Flows (at least from inside the car), won't say I like it better. In my own humble opinion I do think the Flows sound better on a Fox than these but they did produce the result I was after. Sounds more like a modern 5.0 (or I'm going tone deaf from the years of drone :P). They did in fact reduce much of the drone. There is still some there but my migraines will certainly appreciate the reduction! Is it a cheap muffler? I say yes in cost only. It's well built and nicely finished. Is it good value? Yes! My exhaust consists of stainless unequal length shorties into a BBK X-pipe with cats, on into (now) these M80's and out through 2.5" tails. I would definitely recommend these to a fox body owner if you are looking for Flowmaster alternatives!


    Year: 1989 Submodel: Other Newmarket, ON

    Helpful (1) (0)

  • 4/5

    Installation Time: Afternoon

    June 27, 2014

    Great sound in an affordable package

    I have went through 4 different sets of mufflers before finding these and I absolutely love them. My exhaust setup is hooker shorties, 2.5 inch downpipes, 2.5 inch off road H pipe, 2.5 inch dynomax flowtubes, the m80 mufflers, and 3 inch flowmaster tailpipes. These are cheaper than anything els I have found and so far have the best sound as well. Why spend $100 each on some spintechs, magnaflows, or flowmasters when you can get 2 of the m80s that sound better and flow better for less than $100 shipped? I will now be using these on all of my builds when it comes time for exhaust. They are mild but noticeable at idle and when you get on it they really let you know it.


    Year: 1989 Submodel: Other Waterbury, CT, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    January 04, 2014

    Race car sound

    i´m running these with a custom o/r x pipe and wow. the sound is AMAZING if you like the loud race car kinda sound.


    Year: 2002 Submodel: GT Boca Raton, FL, USA

    Helpful (2) (0)

  • 5/5

    Installation Time: Afternoon

    June 10, 2013

    eliminated the drone

    i have a 2010 v6 and deleted the muffler. i had horrible drone on the highway and this muffler eliminated that. it fit great and looks great too.


    Year: 2010 Submodel: V6 Butler, PA

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    April 16, 2013

    Love these bad boys

    What ever you do don't waste your money on slp & etc. These sound just as good if not better. I just welded them into the middle of the car and made my own cat back system. Sounds great. Thanks AM once again!!


    Year: 2005 Submodel: GT Spring, TX, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    October 28, 2012

    Sounds great

    Sounds just the way I wanted very happy with resualts my grin was from ear to ear


    Year: 2003 Submodel: GT Warden, WA 98857, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    August 01, 2012

    These Mufflers Are Wicked

    I took the Flowmasters off and replaced them with these M80s. I didn't know what to expect, but let me tell you these mufflers sound absolutely W I C K E D! If you're listening to video on youtube to get an idea of what these sound like, the videos do not do justice. You have to "be there" for your ears to really get the full effect. hahahaaaa Just be careful and easy on the accelerator while in town! Thanks , great service! (as usual) ☺


    Year: 2003 Submodel: GT Greenfield, Oh

    Helpful (3) (0)

  • 5/5

    Installation Time: Shop Install

    February 20, 2012

    Pypes M80 on 2005 Mustang GT

    well i had these installed on my 2005 mustang, im not a big fan of axle backs, when i first had them installed my setup was BBK long tube headers with an Offroad H pipe. the sound was really throaty not too loud or high pitched just a good rumble until really got on high revs they would drone really bad with the offroad H two weeks later i took the H pipe off and put an Offroad X-pipe on and it sounded waaaaay rasp or drone at all with these mufflers and the X pipe suggestion to anyone looking to get these is to couple it with an off -road X-pipe, its a lot louder and has a cleaner throatier sound than with the H-pipe overall good mufflers and for the price definitely worth it!!


    Year: 2005 Submodel: GT Texas

    Helpful (2) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    January 28, 2012


    I had researched these mufflers on youtube and was in love ever since. I knew this was the exhaust my car needed to have! So i ordered them the next day from AM and wow did i receive them fast. I got them in about 4 days and was very pleased with the service yet again here at AM. The following day i had these mufflers installed at my local exhaust shop and couldn't wait to here what they sounded like. I am also running an off road x-pipe on my 2008 GT. After they were installed I started the car up and WOW! You Tube did not do these mufflers any justice. They sounded 100 times better in person. Pypes really nailed it with these M-80 Mufflers. This is truly how a mustang is supposed to sound. I highly recommend this product. It is high quality at a very reasonable price. Everyone always asks me what kind of mufflers I am running on my Mustang, and I am always proud to say Pypes M-80 Bullet Mufflers. Thanks a lot AM!!!


    Year: 2008 Submodel: GT Castro Valley, CA

    Helpful (3) (0)

  • 5/5

    Installation Time: Afternoon

    January 27, 2012

    amazing sound



    Year: 1989 Submodel: Other OXFORD PA

    Helpful (1) (0)

  • 5/5

    Installation Time: Full Day

    October 20, 2011

    Great Muscle Car Sound!!!

    I used this product on my 2007 V6 and it works, fit, and sounds great. I was debating on these due to AM's listing saying "(79-04)", but read a couple reviews and saw others used them on their S197 Mustangs and tried them out. So i have Pypes V6 Cut And Clamp X-Pipe with these and created a custom True Dual Side Exhaust and it sounds amazing! I get compliments and looks all the time "It sounds like an 8!". Definitely not a "cheap" product it is well worth the money for them. i\I would pay more for them even they're very durable/HD and sound great. DEFINITE BUY IF WANTING OLD FASHION MUSCLE CAR RUMBLE AND GROWL!!!!


    Year: 2007 Submodel: V6 MI

    Helpful (2) (0)

  • 5/5

    May 04, 2011

    07 GT w/ m80's!

    Had these mufflers installed on my 07 GT, i have a pypes o/r x pipe and had the m80s welded in the middle following a custom axle back muffler delete all the way out, (straight pipes) and dammmn! these are loud! they sound mean! nice deep tone when idle, when you rev it up you will wake up the block! nice mufflers definately buy


    Year: 2007 Submodel: GT

    Helpful (16) (1)

  • 1/5

    Installation Time: Afternoon

    April 12, 2012

    Do not buy!!

    I bought these and boy do i regret it. There extremly loud and im not talkin about a good loud either. Really raspy almost sound like a truck with straight pipe. If you go past 2500 rpms you might as well turn the radio off. Sorry should of stuck with magnaflows but that's what you get for trying to save a buck.


    Year: 2002 Submodel: GT Houston, TX, USA

    Helpful (18) (3)

    • Response from AmericanMuscle

      This is the first I've heard someone disappointed with the sound these mufflers give off. I'd suggest coupling these with an O/R X-pipe as some others have commented that the two combined sounds great. If you'd like, please contact our Experts and they'd be more than willing to help you find the sound your looking for!

      Lisa , Customer Care

  • 5/5

    February 15, 2011

    Sounds Awsome!

    These mufflers really brought out the mean sound in my 2000 Mustang GT. Had an Off-road X pipe and the M-80's installed at a local exhaust shop and it turns heads everywhere i drive. I wasn't sure if I wanted to buy these or SLP Loudmouth, but the price caught my eye and was no doubt the right choice! Great Item, Thanks American Muscle.

    Mark S

    Year: 2000 Submodel: GT

    Helpful (8) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    August 17, 2012


    flowmasters sound good but weren't loud enough...these sound 1000 &1/2 times better than magna packs... they don't pop alot like borla , the sound is clean & amazing & they are not obnoxiously loud like slp...don't let the cheap price intimidate you..aslo 99% of you tube videos for these mufflers are don't sound anything like they sound in person


    Year: 1998 Submodel: GT Donaldsonville, LA 70346, USA

    Helpful (6) (0)

  • 5/5

    August 23, 2011

    Quiet in the neighborhood, mean on the street.

    Perfect fit with the Pypes "flow tubes" and some cheap auto part store turndown tips. A little weld to put on the hangers or some ingenuity with a pipe clamp and some wire and these will be the last exhaust you need. Racey growl with Pypes offroad X-pipe, no popping or obnoxious noises, makes a Mustang sound like a Mustang. If you like the 2 chamber drone these are NOT the muffler to buy, if you want Ferrari and lambos to take a second look at you these ARE the mufflers to buy. Happy Stangin'


    Year: 2004 Submodel: GT

    Helpful (10) (2)

  • 5/5

    February 19, 2011

    Just what i needed

    All i can say is these mufflers made my stang quite the head turner after i welded them on. The deep rumple of my coming down the road is something that any muscle car enthusiast would appreciate. Great product!!!!!


    Helpful (6) (0)

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