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Magnaflow Street Series Cat-Back Exhaust (11-12 V6)

Item 48043
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      Review & Installation Video

      I’m Justin with, and I’m going to be breaking down Magnaflow’s Street Series Catback exhaust for the 2011 and up Mustang V6. The Street Series is a very popular choice with many Mustang owners, thanks to its quality build, aggressive yet refined tone, and baffled muffler design, which makes for some impressive gains over your factory Catback exhaust. Now this kit from Magnaflow utilizes 2.5” stainless steel mandrel bent tubing all the way through those baffled mufflers, and out dual 4” polished tips. Now since this kit does bolt directly up to your factory H-pipe, it should make for a relatively painless install, should take you about two hours. Now let’s hear how Magnaflow’s Street Series Catback sounds compared to your factory exhaust.

      Product Information

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


      • More Power and Torque
      • Classic Muscle Car Sound
      • Street Series Muffler - Straight-Through Design
      • Durable Stainless Steel Construction
      • 2.5" Mandrel-Bent Tubing
      • 4" Polished Stainless Steel Tips
      • Fits 2011-2012 V6 Mustangs


      More Power. Give your 2011-2012 V6 the look and feel of a GT with a Magnaflow Street Cat-Back System. This system is dyno-tested and engineered to deliver the signature Magnaflow sound and impressive power gains for your new V6.

      Classic Musclecar Sound. The Magnaflow Cat-Back Exhaust System includes a set of two Street Series Mufflers that feature a free-flowing, straight-through perforated stainless steel core, with stainless mesh wrap and acoustical fiber fill to deliver that smooth, deep muscle car tone.

      Stainless Steel. This premium quality catback is constructed from free-flowing, mandrel-bent 2.5" stainless for superior performance and durability. Finished with dual 4" polished tips, this system looks as good as it performs.

      Application. Made to be a direct bolt on, this catback will bolt straight up to the factory hybrid H-Pipe without any extra modifications required on the 2011-2012 V6 Mustang to give it a deeper, more aggressive sound and improved performance.

      Note: Coupon codes cannot be applied to this product.

      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 Details

      MPN# 15591

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (18)

      Write a Review

      Ratings Summary

      4.3 out of 5 overall rating from 18 customers

      Installation Time: Full Day

      Installation Cost: $100-$250

      • February 21, 2018

        3 2012 V6 - JacobH Installation Time: Less than 1 Hour

        Great sound, horrible fit

        I love the sound but it doesn’t fit very well. One of the tips are off to the side. It took a lot of adjustment and tightening of the claps just to get it to stop rattling. I would honestly recommend you chose another exhaust unless you don’t mind paying to have the hangers cut off and moved. Like I said it sounds great but it’s not worth the money for something that doesn’t fit correctly.

        Helpful (6)
      • August 10, 2017

        5 2012 V6 - JustinWinger Installation Time: Full Day

        Great Sound

        First thing you need to know. You can't put this on with a simple car jack. You will not have enough room to work. I have mine with the Long Tube BBK Headers with the Catted Off Road Mid Pipes. After putting all of these plus the Magnaflow the car felt way more powerful plus sounded like a beast! Couldn't be happier.

        Helpful (6)
      • June 18, 2017

        4 2011 V6 - ChristopherW Installation Time: Afternoon

        Sound better in person, but some gripes.

        First I feel it was money well spent. So far I only have a catback and tune and it sounds amazing. It doesn't sound like a v8. It sounds like a clean mean v6. The tips are very nice looking. Complaints are the exhaust hangers do not line up very good at the bumper. The left side sits perfect and the right side might need to be rewelded as it is pushed to far to the left and up against the bumper which makes the car rattle like a bucket of bolts. I manhandled it to bend the hangers a little which moved it about 1/8" off the bumper to stop the rattling. You will also need 2 1/4" band clamps as none are included.

        Helpful (7)
      • April 04, 2014

        2 2012 V6 - Hsaffie Installation Time: Afternoon

        Poor Construction

        Once the exhaust was on it sounded great. However getting it on was an issue. The welded hangers, weren't welded on straight. The passenger side was welded at in inward angle and the drivers side wasn't welded on at a ninety degree angle. It took an extra hour or so to just adjust the hangers themselves. I expected better craftsmanship them that. I actually had to a cut a part in order for them to attach on. Sound is good, quality not so good.

        Helpful (8)
      • June 04, 2013

        5 2012 V6 - FIAcoupe Installation Time: Afternoon

        Easy to Install, Sounds Great

        It was harder to get the OEM exhaust out than it was to put the Magnaflow stuff in. I had originally installed Pypes mid-mufflers into the OEM pipes, and hated the sound (plus the muffler shop that did the welding really did a terrible job, and the system had a rattle in it that was driving me bonkers. It also sounded like a Honda to me at WOT. Then I installed some BBK long tube headers, and that made everything behind the x-pipe sound even worse. Combined with the BBK headers, this system has a great sound. Since the tips are resonator tips, I didn't need to install my Vibrante resonators at all. My only complaint is that the tips hit the top of the exhaust opening. I'm going to take it to a muffler shop and have them do a better alignment on it. Install note - I had to install the driver's side front muffler hanger onto the muffler and then install the assembly into the car. It was easier this way. I gave four stars for bank/buck because I think the system costs too much (actually all cat-back AND axle-back setups cost too much). Once again, the sound is awesome.

        Helpful (8)
      • April 22, 2013

        1 2011 V6 - Zach11v6 Installation Time: Shop Install Installation Cost: $250-$500

        Rattling and squeaking issues

        I like the tone of this exhaust. Outside of that I am not satisfied. If you want to get an aftermarket exhaust get it done at a shop and have them get the part. In my case, I purchased from American Muscle and had a mechanic shop install the exhaust. After a few months, the exhaust began to rattle and squeak when driving over bumps. I have since taken my car to Ford three times and had them try to fix it. I paid the same install price a SECOND time to have Ford align the exhaust. Now, after getting my car back today Ford tells me that there is an issue with a sleeve/clamp continually loosening. They recommended contacting the manufacturer. The problem is obviously the exhaust unit. However, it will cost me hundreds to have Ford or any shop take the unit off and either put on a new Magnaflow exhaust or my old exhaust since the part was not purchased through them. I love American Muscle. They have great prices and free shipping. However, I cannot see myself getting a large part like this again online. I now have a $700 rattling/squeaking exhaust (excluding the hundreds I paid for install/reinstall). I have spent thousands at American Muscle and I wish I could get a refund. I cannot afford to pay to have the old exhaust taken off and a new one installed. In summation, I would not purchase this large part again.

        Helpful (10)
      • April 17, 2013

        4 2012 V6 - xxTHEJONxx Installation Time: Less than 1 Hour

        Great sound!!

        Great sounding muffler. I have the bbk LT headers and an off road x-pipe and it sounds just like i wanted. It is a little raspy on the high rpm range but I believe that is the off road x-pipe. The fit and finished is good but the mufflers sit a little high. I might need to do some modifying to the hangers to get them to sit in the right place. Other than that everything was great. It was about an hour of work with a lift.

        Helpful (5)
      • November 27, 2012

        5 2011 V6 - PRMustang2011 Installation Time: Afternoon

        With bbk headers and catted x pipe

        They sound exelent i recomend it for this combination sounds great and increas in hp and whp

        Helpful (7)
      • October 14, 2012

        5 2012 V6 - Bieb Installation Time: Afternoon

        What stock should sound like...

        First the install, like Fuel said in his review, a lift would be ideal but it can be done with a floor jack and two good jack stands. I had to put the jack stands on the highest setting and barely got the stock exhaust pipes out. The install was easy and straight forward, but ensure that the mid pipes are positioned properly or else when tightening the clamps it will cause your mufflers/tips to not line up with the cutouts in the rear bumper properly. This happened to the passenger side and we had to use a few washers to lower the rear hanger for proper fitment. As far as sound and performance, this exhaust sounds great. At start up it sounds nice and then quiets down to almost stock level after the car warms up. At cruise it is barely louder than stock, however punch and it sounds awesome. Definitely no popping or annoying ricer sound, only a nice growl. As far as performance, I think it might have added some power paired with the Airaid intake that I previously installed. Overall, I'm extremely happy with the exhaust and would definitely recommend it to anyone who wants an exhaust thats louder than stock but not annoyingly loud with decent performance gain. Should have come from the factory this way.

        Helpful (10)
      • August 28, 2012

        4 2011 V6 - Fredo1 Installation Time: Afternoon

        Love the sound, but

        The fit is not perfect. The shop had to cut the hangers and re-weld them as there was no way to have a gap of 1/2 inch from the plastic rear-end. Maybe i happen to have a bad batch, who knows. Also, the pipes after the cat, are AWEFULLY close to the axle, be careful to angle the pipes correctly as they will rattle against the rear axle. Otherwise, the sound is great, the tips look great. They are quiet while cruising, but can get very expressive when pressing the gas pedal. Perfect for me. They won't crackle/pop until you do the full headers (BBK LT)

        Helpful (8)

      Questions & Answers (4 answers)

      4 Top Rated Questions

      Is this exhaust made from 304 or 409 stainless steel?

      • Hi, This Magnaflow Street Cat-Back Exhaust is made from 409 Stainless steel

      Helpful (0)

      Will this work with shorty x-pipes? Will this system work with shorty x-pipes or do I have to get an axelback system?

      • This Magnaflow Street Cat-Back Exhaust (11-12 V6) will work just fine with a shorty X-pipe.

      Helpful (0)

      HP Gains I have a 2012 Mustang V6. Realistically what can I expect to gain in extra HP?

      • It's difficult to say. What other bolt ons do you have? Elevation? Driving habits? Definitely you'll gain HP, my estimation at least 10. Less restrictive, you'll also notice better MPG, performance and of course- SOUND!

      Helpful (0)

      Does this fit the 2013 V6?

      • Magnaflow actually made a version of the street catback specifically for the 2013 V6 that fits perfectly. Check out the link below!!

      Helpful (0)
      Post Your Question

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Right muffler assembly
      • (1) Left muffler assembly
      • (1) Right tailpipe assembly
      • (1) Left tailpipe assembly
      • (2) clamps

      Tech Specs

      Cat-Back Exhaust Specifications
      Piping Material: Stainless Steel Tip Material : Polished Stainless Steel
      Piping Size: 2.5" Tip Size: 4"
      Muffler Type: Straight-through Fitment: 2011-2012 V6 Mustangs

      Will It Fit My Mustang

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