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Pypes Mid-Muffler Cat-Back Exhaust (11-14 V6)

Item 20111
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      Review & Installation Video

      So the Pypes Mid Muffler Cat-Back we're looking at today is for all 2011 through 2014 Mustang V6 owners. And it's gonna be a good option for someone that's looking for a big increase in volume out back while sticking to a tight budget. Now this will be one of the most affordable stainless steel cat-backs that offers a big boost in volume that's gonna be thanks to the straight-through M80 race mufflers. And like most if not all cat-backs or axle-backs, this isn't gonna take that much effort to get on. And you're looking at a straightforward one out of three wrenches on our difficulty meter here, about a two-hour job. And I will have more for you coming up on that later.So what you just heard in our sound clip is a strong four to five on the loud meter, so you're just shy of a really extreme set-up. Now with any exhaust out there, you can always go louder, but it's tough to get quieter. And what I really like about this is that it's a really great place to find that sweet spot or middle ground. So if you wanted to make the jump and go full core press, you can pick up a Pypes X-Pipe for just over $100, where you'd then be looking at a full five out of five. And that's still plenty more affordable than many other out-of-the-box exhausts with that level of volume. The system's pipes are primarily 409 stainless which is gonna help keep the price down. While they're not 304 stainless, they'll still hold up to rain and snow, but you might see some surface rust after a little while. Now keep in mind that it's something where no one's really gonna see this because it is gonna be under the car, and I wouldn't be too concerned about that. The 4-inch polished tips are made out of a 304 stainless, so they're always gonna be looking great. And moving forward or to the back, depending on how you're looking at it, we'll see the M80 mufflers used here are gonna be a 304 stainless steel as well. And they use a stainless steel mesh inside of a louvered tube that's packed with basalt insulation. Now basalt is said to manage sound better than a fiberglass, so you'll enjoy a deeper and more rich tone, which is gonna be important for the V6. So like I said earlier, this exhaust is one of the most affordable in the category. And at just around $500, you're getting a full stainless, a nice muffler, and plenty of volume with the ability to crank it up to a five out of five for just a few bucks more, and it's really a no-brainer. Now installation-wise, cat-backs go on with little to no effort at all, which makes them a great contender in my opinion. And you should expect a straightforward two hours' worth of wrenching, which is going to warrant an easy one out of three wrenches on our difficulty meter here.Now the tools required for the job will call for a pair of jack stands, a basic socket set, maybe some penetrating oil to hit your factory hangers. So you'll wanna start by getting your car's rear end off the ground. Then work with unbolting the existing system from directly behind your factory mid-pipe. So moving on, you'll get to the back of the car. Remove the axle-back portion of the system and then start back at the mid-pipe. Throw your mufflers in place, tighten down your intermediary piping, get your over axles in place, and then you're good to go.So that'll wrap up my quick review of Pypes Mid Muffler Cat-Back fitting the 2011 through 2014 V6. That can be found right here at

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Increases of 5 to 10 Horsepower
      • Aggressive Exhaust Sound
      • Mid Muffler Design
      • 2.5" 409 Stainless Steel Tubing
      • 4" Polished 304 Stainless Steel Tips
      • Fits 2011-2014 V6 Mustangs


      Increase in Performance and Sound. Bolting on a Pypes Mid Muffler Cat-Back Exhaust to a stock 2011-2014 V6 Mustang will yield an instant 5 to 10 horsepower gain at the rear wheels. It features two of Pypes high flow M-80 Bullet Style Mufflers for the ultimate in unrestricted flow and power gains for a deeper throaty tone.

      Aggressive Throaty Sound. The Pypes Mid Muffler Cat-Back features two high flow straight-through M-80 Bullet Mufflers that are mounted directly after the Mid Pipe, instead of after the axle, to produce an aggressive deep throaty muscle car tone with the help of two oversized stainless steel tips.

      Quality Materials. This Pypes Mid Muffler Cat-Back Exhaust system is constructed from free flowing mandrel bent 2.5" 409 stainless steel tubing and features two Pypes M-80 Bullet straight-through mufflers for an aggressive throaty sound. The whole system is finished off with a set of 4" polished 304 stainless steel tips for modern Muscle Car styling.

      Application. The Pypes Mid Muffler Cat-Back Exhaust kit is specifically designed to simply bolt-on to the existing factory hybrid H-Pipe of the 2011-2014 and newer 3.7L V6 Mustang for more power and a louder more aggressive sound.

      Note. Stock 2011 V6 Mustangs come stock with a Mid Pipe that resembles both the H-Pipe and X-Pipe designs. This hybrid Mid Pipe was created by Ford to help add additional power and sound to the V6 straight out of the factory.

      Fitment: 2011 2012 2013 2014 Details

      MPN# SFM79

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (45)

      Write a Review

      Ratings Summary

      4.6 out of 5 overall rating from 45 customers

      Installation Time: Full Day

      Installation Cost: $100-$250

      • February 27, 2020

        5 2011 V6 - Adam Installation Time: Shop Install Installation Cost: $100-$250

        If you're looking for a deep exhaust, get this.

        let me just start out by saying that this exhaust sounds amazing. All of the car guys give a listen to the exhaust almost all say the same thing, its usually along the lines of, "dude the sounds great considering it's a v6" or "wait did you say this thing was a v6?". If you're worried about loudness, it does make your exhaust louder but not too loud and I think that's the beauty in this system. Now between 3500 rpm and 4000 rpm, right before the cars about to shift into a higher gear (i have the automatic) there is a little bit of annoying drone that almost seems to resonate throughout the car but otherwise thats the only "bad drone" this exhaust has. Now if you're wondering if you can hear it inside the car, yes you absolutely can and it gives the car so much more life. One of the things that I love the most about this exhaust is the idle, its louder yes, but the best thing is that it's a low deep grumble, like the car's angry and ready to go. Now I had a shop install these so I did not install them myself for a couple of reasons. One, I bought my 3.7L mustang used with 82,000 miles on it, that being said I knew that there would be some rust on the undercarriage that would give me some trouble. I also live in Minnesota and as i'm writing this review it's currently winter which means it's below 20 degrees regularly and I also don't have a heated garage so I just was not gonna deal with all that, I also figured if i was spending nearly $700 on this exhaust, spending another $100 or so to have it installed is not that big of a deal. It turned out to be the right choice because there was enough rust to make it really difficult for him to take the old exhaust off, than he also spent a pretty decent amount of time, about 45 minutes making sure everything fit perfectly so he did a little bending here and there but not a lot. At the end of the day it took him about three and a half to four hours all said and done. He charged me $150 which I didn't think was that bad. Overall it is an amazing exhaust and has given my mustang a lot of life, and it sure turns heads when you hit the throttle.

        Helpful (0)
      • October 09, 2019

        5 2014 V6 - Rico Installation Time: Less than 1 Hour

        Sounds great at 3-5k RPM

        Like I said in the title, the exhaust sounds great between those RPMS. Below 3K you can still hear a little rumble but not too much. Also there is some drone but I don’t mind it reminds you that there’s an aftermarket exhaust.

        Helpful (0)
      • April 10, 2019

        5 2011 V6 - Mountainlove Installation Time: Less than 1 Hour

        Awesome exhaust

        For being a lower end exhaust, this one is awesome. It was easy to install, used a rack, which only took about 45 minutes total including the stock exhaust. It has a much deeper tone than stock which is much better in my opinion. If you want an exhaust which gives you a good bang for you buck I recommend this exhaust system.

        Helpful (1)
      • January 12, 2019

        5 2011 V6 - DanielP


        Everything 2k and up is so much more satisfying without adding too much drone when just cruising. Also doesn't idle crazy loud which is nice so I'm not waking up the neighbors. Going to be honest with the install time, took me about 4 hours. Mainly had trouble getting the stock exhaust out(getting both sides over the axle took about an hour) and had some trouble with the fitment on the drivers side when putting it on. Everything was done on jack stands and I could see this taking less than an hour on a lift. Also I'm totally new to all this.

        Helpful (4)
      • September 11, 2018

        5 2014 V6 - DawnC Installation Time: Less than 1 Hour

        Deep rumble and pop perfect for a V6

        I have now had my pypes on for 2 weeks and I absolutely love the sound they put out. They have that deep growling sound to it the pops when you switch gears which sounds great. They're not too loud from the inside if you still want to listen to the radio and you're cruising at 80. I would definitely recommend them. They fit well with my cervini rear pipe body kit

        Helpful (2)
      • July 11, 2018

        5 2014 V6 - DanielF

        Great Sound!

        This setup has a great note to it - you wont have people accusing you of trying to emulate the sound of a V8, but it definitely has a deep, aggressive sound. Good idle volume, daily driving around town won't get you in trouble unless you put your foot down, then it reeeeeaaally screams!

        Helpful (5)
      • May 09, 2018

        5 2014 V6 - JacobR Installation Time: Less than 1 Hour


        This Mid Muffler is amazing! The sound is so aggressive and easy fit.

        Helpful (4)
      • March 17, 2018

        3 2014 V6 - CarlosG Installation Time: Afternoon

        Mid muffler

        Three reason in giving it 3 starts instead of 5 is because the pipes weren't packaged good. When I received them they were bent on the opening and end of each one. I know that's not their for but if they would had put a little bit of extra protection I think it would had prevented it. Plus when I installed them the right pipe was laying against a metal and was producing a trumpet type of sound at first, so I had to do a little bit of mods to prevent it. Other than that the sound is good for a daily driver, and way better sound than the stock.

        Helpful (5)
      • February 21, 2018

        5 2012 V6 - AmaurisAdames Installation Time: Afternoon

        get what you pay for

        my car sound amazing and people turn their head when I rev my car. nice touch....great sound

        Helpful (5)
      • February 13, 2018

        4 2012 V6 - NickR Installation Time: Afternoon

        Quality Product

        Could be a bit louder, but the exhaust note is great. The fit was pretty good up until the tips, which had a very hard time lining up with each other. For the quality at the price paid, I am stunned by what a great product this is.

        Helpful (7)

      Questions & Answers (23 answers)

      5 Top Rated Questions

      Will this still use the stock H pipe or will it need to be replaced?

      • The Pypes Mid Muffler Cat-Back Exhaust is designed to attach to stock or aftermarket midpipes and will require no modification to be able to.

      Helpful (2)

      does this require a tune

      • Nope, A tune is not required

      Helpful (2) Show 2 more answers

      Is there drone? How would you rate the drone?

      • This can have a bit of drone around mid to high RPMs. From the feedback, we receive this is short lived and not overbearing. 

      Helpful (1)

      Does it include the catalytic converter?

      • The Pypes Mid Muffler Cat-Back Exhaust will not come with catalytic converters no.

      Helpful (1)

      Will this fit into the BBK Catted X-Pipe with BBK long tube headers? If it doesn't fit into the BBK catted X-pipe, can you tell me which cat-backs will fit into it? or what I would need to make the cat back fit? Thanks!

      • The Pypes Mid Muffler Cat-Back Exhaust will attach directly to the BBK Catted X-Pipe without any issues. The X pipe will also bolt to any catback exhaust designed to attach to an OEM X pipe, as the 2.75" BBK X pipe will neck down to 2.5" to connect to the OEM style catbacks.

      Helpful (1)
      10 More Questions
      will this work with offroad? i was looking into shorty bbk headers or long tube headers with the shorty xpipe. will this work with the long tube set up? 1 answer
      I this system quieter that the Roush Axle back? 0 answer
      Can i use this pipe with my Roush exhaust. I want too Combo this midpipe with my Roush on the End to make my Roush exhaust a little bit quiter. 1 answer
      How many decibles is it ? 0 answer
      Can i install just the axleback and not the full setup to a stock mustang v6 2012. Reason i ask is i have this exhaust but just the axleback and not the full catback and im trying to sell this to a friend with a stock v6 mustang 2012 1 answer
      So it says the diameter on these are 2.5", but aren't the stock pipes 2.25"? where do they increase? 1 answer
      Two questions: I was wondering if the diameter of the m80s are the same as the tubing, 2.5 inches. Also, if I decided to install the Ford Racing cut-and-clamp x-pipe, would that work with this catback? Thanks! 1 answer
      Are these street legal or offroad only? 1 answer
      Would this present any drone in my 2012 Automatic V6? Just curious as I am looking for a cat-back with no drone. 1 answer
      I bought the same system but in the black tips along with the MMD defuser makes it look okY but too dark in the rear end.... is there any way to buy the tips alone ? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (2) 16” pipes
      • (2) M-80 mufflers
      • (2) Over-axle pipes
      • (2) Muffler-delete tailpipes
      • (2) 4” polished tips
      • Installation hardware

      Tech Specs

      Cat-Back Exhaust Specifications
      Piping Material: 409 Stainless Steel Tip Material : Polished 304 Stainless Steel
      Piping Size: 2.5" Tip Size: 4"
      Muffler Type: Straight-through Fitment: 2011-2014 V6 Mustangs

      Will It Fit My Mustang

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