(approx) 1 Hour
Light to Moderate mechanical skill required.
- Customer Submitted:
- How to Install an Axleback Exhaust on your 2011-2012 Mustang GT
Hi I’m Justin with AmericanMuscle.com, and I’m taking a look at Flowmaster’s outlaw series axle back for your 2011 and up Mustang GT. The outlaw series is Flowmaster’s most aggressive system thanks in part to the straight through, race oriented style mufflers. The result, a super aggressive tone that’s sure to get you noticed. The system is constructed from durable 2 and 3 quarter inch 16-gauge steel, leading straight through these outlaw style mufflers. The cheery on top are these 4 inch polished tips, embellished with a Flowmaster logo. A simple bolt on installation here guys, should take you no more than an hour. Let’s hear how Flowmaster’s outlaw style axle back measure up to the stock exhaust.
Subscribe to our YouTube Channel
Features, Description, Reviews, Q&A, Specs & Installation
Fitment: 2011 2012 Details
CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
January 14, 2020
My flowmaster outlaws sound great and the 4 inch tips look greatHelpful (0)
December 16, 2019
A big diff Awesome sound with great fit. Look great in my GTHelpful (0)
December 10, 2019
I replaced my roush mufflers with the outlaws I am more than pleased. They sound great it makes the Boss sound really good especially with kooks long tube headers.Helpful (0)
September 30, 2019
Amazing Sound WOW
I put these on by myself in about an hour without jacking up the car and I’m a bigger dude. They really woke up my 11’ GT500 and sound amazingHelpful (0)
March 26, 2019
Honestly I feel my Roush axle backs are louder then these. But the Roushs were starting to split at the welds so wanted something louder but doesn’t sound like it. Sounds good but not the same bark as the Roush ones at full throttle. Still have stock exhaust from axle forward so on to those next!Helpful (1)
March 22, 2019
This is exactly how your V8 should sound, this exhaust is exactly what I wanted. The install took me around 2 hours with only a jack, jack stands and hand tools, if I can do it alone, anyone can do it.Helpful (0)
January 21, 2019
It’s very loud and has an amazing tone, people always ask me what I did to it!Helpful (2)
December 28, 2018
Bang For Your Buck
This exhaust is one of the loudest ones you can get for the GT. Has a nice mean growl and you will def break some necks in the process. It only gets better when you have a intake. Anyone can do it, don’t take it to a shop, just need an jack, simple hand tools, and some lube.Helpful (4)
December 11, 2018
That roar you've been looking for
Amazing exhaust note, just a really loud cabin drone around 2k rpms, either get used to it, break it in, or get sound proofing.Helpful (4)
October 31, 2018
Loud and Proud
Had my outlaws installed on Saturday and absolutely love them! Deep and mean growl at idle... smash the gas and you better buckle up buttercup. If you want to turn heads, look no further. Highly recommended.Helpful (9)
HI, I LIVE IN MEXICO, AND WISH TO ORDER THESE, BUT NEED TO KNOW THE FOLLOWING INFO.. SO THAT I CAN CALCULATE SHIPPING WEIGHT OF THE PACKAGE LENGHT OF THE PACKAGE HEIGHT OF THE PACKAGE WIDTH OF THE PACKAGE I WOULD REALLY APPRECIATE YOUR HELP.
These will weight roughly 24lbs and will be roughly 35.33 X 14.67 X 15 in size.
How far does the tips extend out the rear of the car? I was wondering how far does the tips extend out the rear of the car compared to stock?
Not much at all it's perfect
Is there any way to lessen the exhaust drone at around the 2k RPM mark when its really bad on the highway?? Currently running straight pipes w/ cats and factory headers.
Unfortunately we do not currently offer a resolution for the drone. The best thing to do is switch to a quieter exhaust as this could help lower the drone you experience at 2000 RPM.
I live in California and I drive a 2013 Boss 302. I'm wondering if this Exhaust system will keep up with the new sound regulations?
None of our exhausts currently have the decibel levels so it is unknown if they are in compliance.
I’m seriously interested in installing this on my 2011 gt, ragtop. It would be the 1st mod done. Will this require any tuning, or is this simply a drop n swap?
The Flowmaster Outlaw Axle-Back Exhaust is a completely bolt-on exhaust system. This exhaust does not require a tune or additional modification for a complete installation.
The rear lower valance on the 2013-2014 models is different from that on the 2011-2012 model Mustangs. These are specific for the 2011-2012 model Mustang rear end.
I apologize, we would be unable to change out the tips.
The outlaws are definitely one of the loudest exhausts offered for the 11-14 Mustang GT models. It will really depend on the sound you're wanting for your vehicle.
I do apologize, but this Flowmaster Outlaw Series Axle-Back Exhaust will not work with the Pypes True Dual Exhaust X-pipe Kit. You would need to use item number 18423 which you can find here: https://www.americanmuscle.com/flowmaster-outlaw-axleback-0510gt.html
This Flowmaster Outlaw Series Axle-Back Exhaust is designed to fit the 2011-2012 GT, Boss and the 2011-2012 Shelby GT500 Mustangs only.
The Flowmaster Outlaw Series Axle-Back Exhaust will not work on your car as they are for 11-12. However, with the mid-pipe, I have linked below you will be able to then put any 05-10 GT cat-back on your car. https://www.americanmuscle.com/pypes-0509-v6-xpipe.html
No. I have them on my 2011 GT500 and they sound great. If you have it mapped you wil probably pick up a few more horsepower but they're good on their own.
Normally, You gain 3-8 HP for these, but nothing noticeable. Still an excellent choice for exhaust, by far one of the best.
I have the Outlaw exhaust on my Shelby and I love them. They're loud and throaty without being too loud. Great bang for the buck!
If you already have the Magnaflow Comp Catbacks, you really don't need these muffler delete axelbacks. Sure it'll give you more "rumble" but I ask why since the Magnaflow Catbacks like I have installed on my 2010GT are plenty loud enough for my liking. IMHO.
(approx) 1 Hour
Light to Moderate mechanical skill required.
What's in the Box
|Piping Material:||409 Stainless Steel||Tip Material :||Polished Stainless Steel|
|Piping Size:||2.75"||Tip Size:||4.0"|
|Muffler Type:||Straight-through||Fitment:||2011-2012 GT, Boss and Shelby GT500|