2013 Mustang GT Axle Back Comparison
All Mustang Enthusiasts have asked the same question at some point – what exhaust should I put on my car? Well thankfully, thats a question that we can help you answer. Sure you can turn to YouTube but lets face it you usually get some cruddy cell phone camera or decent picture with tons of wind noise. As part of our solution we thought we would give you solid test data and consistent comparisons. We also thought, “Why not start with our 2013 Mustang Project High Impact?” So without dragging this on any further lets get down to business.
We tested the following axle back on stock headers and mid pipe.
- 2011-2013 Mustang GT/500 5.0L/5.4L Ford Racing Sport Axle-Back Exhaust Kit, M-5230-Mgtla
- 2011-2013 Mustang GT/GT500 5.0L/5.4L Ford Racing GT500 Style Axle-Back Exhaust Kit M-5230-Mgtca1
- 2011-2013 Mustang GT/GT500 5.0L Flowmaster Hushpower Axle-Back Exhaust System
- 2011-13 Mustang GT & GT500 Flowmaster Outlaw Axle Back Exhaust Kit
- 2011-2013 Mustang GT/GT500 5.0L/5.4L Bassani Street Race Mufflers
The test contained a couple parts to provide you with as much detail as possible:
- We filmed stationary revs in a controlled environment (our warehouse). This allowed us to cut out all the wind noises and traffic that you often get from filming outside.
- We also filmed the outside driving from a camera mount that was mounted in the same spot for all drives. The outside drives were slightly spirited drives shifting at 4,000 RPMs each gear until we hit the speed limit of 70mph.
- To give you a better understanding of just “how much louder” the exhaust is we compared them all to a factory exhaust. Since films can be deceiving and don’t give you real world answers like “is there a drone” we did the test drives with two people. Nathan, proud 5.0L pushrod guy, and myself, a mod motor guy, took notes after each drive and rated many different aspects of the exhaust.
- One last and neat new feature is for both the drive and the inside controlled environment test we used a decibel meter to monitor peak decibel reading on each exhaust. The meter was place in the exact same spot for each test. This allows us to give you a rough percentage of just how much louder or quieter each exhaust actually is compared to stock.
Check out each tab for notes from both Nathan and myself. We did the rating scale on 1-5 with five being the best. To see our final conclusion, check out the summary tab at the end. Enjoy and we truely hope you find these and our future exhaust test useful in your exhaust selection.
Don’t let the words “Stock Exhaust” fool you when it comes to the S197 cars. Ford really did their homework. These cars definitely have a nice deep growl; especially compared to the old days of the 4 catalytic converter mid pipes and huge/heavy factory mufflers. Despite the less restrictive exhaust on the S197 cars they still get better emission rating. It is nice to see automotive technology advancing.
Ford Racing Sport Axle-Back Kit M-5230-MGTLA
Jeff’s Review:
Scale of 1-5: 5 being the best
- City Drivability: 5
- Hwy Drivability: 5
- Sound “Aggressiveness”: 3
- Bang for Your Buck: 2
- Looks: 5
Notes: The Ford Racing Sport axle back had one of the best fit and finishes of all the kits we tested. The chrome tips feature a stamped Ford Racing logo (visible in test video). This axle back was just slightly louder than stock on the inside of the car; yet featured a nice deep tone from the outside. It had no noticeable drone or annoying RPM range while cruising. I gave these mufflers the best all-around drivability because of these features. They are the priciest kit we tested but as with the Bassani you can tell you get better quality with the higher price. The only real complaint I have on this axle back is the fact that it wasn’t as aggressive as the GT500 in overall sound. This is probably from the fact that this is a packed muffler and will get a louder over time.
Nathan’s Review:
Scale of 1-5: 5 being the best
- City Drivability: 4
- Hwy Drivability: 5
- Sound “Aggressiveness”: 3
- Bang for Your Buck: 3
- Looks: 5
Notes: I thought this exhaust set up was really similar to the GT500 Axle back with better looking tips. It wasn’t quite as aggressive as the GT500. It being more expensive my choice is the GT500 Axle back.
Ford Racing GT500 Axle-Back Kit M-5230-MGTCA1
Total Points Winner
Jeff’s Review:
Scale of 1-5: 5 being the best
- City Drivability: 5
- Hwy Drivability: 5
- Sound “Aggressiveness”: 4
- Bang for Your Buck: 5
- Looks: 2
Notes: This had to be the biggest surprise out of the bunch. The GT500 mufflers are nearly same size as factory but save you about 5 pounds per muffler. The finish looks very close to the factory muffler. The biggest complaint from me on the muffler is that it didn’t have a really nice exhaust tip compared to all the others we tested. The tone and sound were great. Because this was not a “canister” style muffler, we didn’t have any drone. The tone was very aggressive and you also can’t beat the price. With me being a “on a budget” kind of guy this would be my first choice for an axle back. The overall drivability was nearly stock but with a much deeper more aggressive tone. This is a very solid choice for a new axle back for your 2011+ Mustang.
Nathan’s Review:
Scale of 1-5: 5 being the best
- City Drivability: 4
- Hwy Drivability: 5
- Sound “Aggressiveness”: 4
- Bang for Your Buck: 5
- Looks: 4
Notes: This was my favorite out of the axle backs tested. It’s aggressive when given gas but quiets down nicely at highway speeds with little to no drone.
Flowmaster Outlaw Axle Back Kit
Jeff’s Review:
Scale of 1-5: 5 being the best
- City Drivability: 3
- Hwy Drivability: 2
- Sound “Aggressiveness”: 4
- Bang for Your Buck: 4
- Looks: 3
Notes: The aggressive tone from this axle back was great on the factory mid pipe and stock headers. The major down side to this axle back was the annoying “drone” you got cruising at about 2k RPMs. To me this is not the exhaust you would want on the car if you did a lot of highway driving. The tips were nice and the overall size of the axle was small which made it easy to install. I was not a fan of the black paint used to coat the rest of the exhaust. It seems like it would chip off or scratch easily. This was the lightest axle back we tested.
Nathan’s Review:
Scale of 1-5: 5 being the best
- City Drivability: 4
- Hwy Drivability: 2
- Sound “Aggressiveness”: 4
- Bang for Your Buck: 3
- Looks: 3
Notes: This exhaust is by far the most aggressive sounding exhaust out of the ones tested but it gives up Highway Drivability. This exhaust is loud no matter what speed. It sounds great around town but has a loud drone at 60-70 mph.
Flowmaster Hushpower Axle-Back Kit
Jeff’s Review:
Scale of 1-5: 5 being the best
- City Drivability: 4
- Hwy Drivability: 3
- Sound “Aggressiveness”: 4
- Bang for Your Buck: 3
- Looks: 3
Notes: The Hush Power axle back had a deep aggressive tone and managed to eliminate a lot some of the drone of the Flowmaster Outlaw axle back. This axle back still had a drone around 2k RPM but was much more tolerable when compared to the Outlaw axle back. The overall finish was exactly the same as the Outlaw axle back. It had a nice chrome tip but again I just was not a fan of the black paint used to coat the rest of the exhaust. The canister style muffler cut off a lot of weight compared to the factory mufflers and gave more room for installation.
Nathan’s Review:
Scale of 1-5: 5 being the best
- City Drivability: 4
- Hwy Drivability: 4
- Sound “Aggressiveness”: 3
- Bang for Your Buck: 4
- Looks: 3
Notes: The Hush Power exhaust gives you a little bit of both worlds. This exhaust is aggressive when in the gas but cruising around town and on the highway it quiets down to a nice level. It does have bit of a drone at 60-70 mph
Bassani Race Axle Back
Jeff’s Review:
Scale of 1-5: 5 being the best
- City Drivability: 4
- Hwy Drivability: 3
- Sound “Aggressiveness”: 5
- Bang for Your Buck: 2
- Looks: 5
Notes: The exhaust tone was one of the best out of all the axle backs we tested. The finish was great. The all metal (no paint/coating) finished looked great from any angle. There was a very slight drone on this axle back around 2k RPM. I noticed it just a little less than the Flowmaster Hush Power. Due to the higher cost compared to the Hush Power it got a lower “Bang for the Buck” rating; however, you can tell that the extra money gets you very high quality fit and finish.
Nathan’s Review:
Scale of 1-5: 5 being the best
- City Drivability: 4
- Hwy Drivability: 5
- Sound “Aggressiveness”: 3
- Bang for Your Buck: 4
- Looks: 4
Notes: I rank this exhaust right with the Flowmaster Hushpower. The exhaust volume was really close to each other. This exhaust doesn’t have as prominent of a drone at highway speeds.
Below you will find two comparison charts. The first shows Nathan’s scores, my scores and an average score for each axle back. The second chart give you a comparison of each exhaust side-by-side. This chart also shows how much louder than factory each test was in percentage form. To make the chart easy to read at a glance, we highlight each test’s highest reading in red and lowest reading in yellow.
We ultimately went with the Ford Racing Sport Axle back on Project High Impact. We decided to stick with the Ford Racing theme that the car had taken with the wheels and suspension upgrades. We also felt the GT500 Axle Back in overall looks just did not do Project High Impact the justice it desired. The overall quality and look of the FRPP Axle Back just made a huge improvement to the look of the car.
Comments
This blog should help you get a better idea of what axle back to buy for you 2011+ Mustang. I hope it will help answer some of the questions you may have about any some of the more popular axle backs we offer.
[...] Mustang GT Axle Back Comparison 2013 Mustang GT Axle Back Comparison Tons of people are always asking the question, "Which axle back should i go with?" We [...]
[...] Mustang GT Axle Back Comparison 2013 Mustang GT Axle Back Comparison Tons of people are always asking the question, "Which axle back should i go with?" We [...]
Excellent comparison. But please had the flow rate for each muffler. Sound is important-but CFM should be just as important. Isn’t it possible to rate the CFM like carburetors are rated?
Excellent comparison. But please add the CFM flow rate for each muffler. Sound is important-but performance is also.
This was awesome. The most informative exhaust comparison I have ever seen.
Thanks for the feedback. Our goal is to help our customers as much as possible
There seems to be a mistake in your overall comparison chart. For the Ford Racing Sport exhaust, it’s listed as having an outside decibel reading of 87.1 at 4k yet the “% greater that factory reading” is listed at 16%. It the stock outside decibel reading is 84, shouldn’t that number be approx. 3.7% or should the outside reading be at approx what’s listed for the GT500?
I am shocked you guys went with the frpp sport axle back after all the praise for the gt500 axle back. In my opinion the sport with its gaudy tip that sticks out 3 inches farther than it should is quite hideous and at twice the cost and with a weaker exhaust note it is not even a competition.
David, I think we shocked ourselves on this one. We really wanted to stick with the FRPP theme and the with the FRPP logo on the axle back it was a no-brainer for the build. They didn’t last long on the car – after our R&D we changed it out with the 2013 GT500 axle back kit. Check it out in this video – http://youtu.be/sk0FQIWt5wM
FYI the tips will protrude farther out if you do not adjust from the H-pipe. Loosen and slide the pipes back and they will line up nicely.
Thanks for the added tech tip on that!
Is it planned to eventually update this comparison (or do a new one) and include other great name in the axle back universe?
Like Roush, Corsa or even Borla (which should sound close to the FRPP they also make) since you already compare Bassani and Hushpower (which are basically the same with different branding), maybe Magnaflow, Kooks and MAC too.
That way this comparison would become “the” place for everybody who would like to compare almost every 5.0 AB on the market all tested in similar condition.
BTW thanks for what you’ve already done.
PS: Just a note, have you ever notice that the “outside sound” in the MGTCA1 video is just barely audible?
Joey
We will work on more exhaust clips as we continue our video series. The MGTCA1 axle back kit audio may have been effected by the camera at the time. This was pre-Go Pro Hero era with better video and sound quality. Stay tuned and subscribe to our YouTube channel to get all the latest videos!
[...] 2013 Mustang GT Axle Back Comparison This might help you out in the decision Congrats on the new car! __________________ 2013 Race Red GT —————— Brembos, 3.73's, Magnaflow comp catback. [...]