Why would an axle-back improve performance? - Mustang Evolution

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Old 05-18-2014, 01:28 AM   #1
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Why would an axle-back improve performance?

I've done a lot of reading on this forum and on American Muscle about exhausts, listened to sound clips, and I think I've decided on the Magnaflow Street axle-back for my 2012 V6. Just one technical question that's bugging me. Why should an axle-back exhaust improve performance, assuming no other modification? Seems to me it shouldn't really improve the flow or reduce the back pressure. Are the stock mufflers really that restrictive? Or are axle-backs just for an improvement in sound, not in performance?
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Old 05-18-2014, 01:37 AM   #2
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I never thought they did. I just thought it improved sound quality. I did notice a slight different when I installed my catbacks but could possibly be placebo who knows.
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Old 05-18-2014, 03:21 AM   #3
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Yeah that makes sense to me. On American muscle they say "you'll definitely see more power and sound versus your stock exhaust." I think they're just saying that to sell products... The difference should be negligible. The word "more" is not quantitative, so it's not like they're lying.

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Old 05-18-2014, 03:46 AM   #4
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Quote:
Originally Posted by Sakib View Post
I've done a lot of reading on this forum and on American Muscle about exhausts, listened to sound clips, and I think I've decided on the Magnaflow Street axle-back for my 2012 V6. Just one technical question that's bugging me. Why should an axle-back exhaust improve performance, assuming no other modification? Seems to me it shouldn't really improve the flow or reduce the back pressure. Are the stock mufflers really that restrictive? Or are axle-backs just for an improvement in sound, not in performance?
Go to the American Muscle site. Click on Exhaust, then click on Axleback Exhaust.

Then go down and click on Info & Advice. Then go click on All About 2010-2014 Mustang Axlebacks.

Hope that helps.
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Old 05-18-2014, 05:37 AM   #5
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I can't tell you how restrictive the factory mufflers are (I've heard they flow fine, I've never heard that they hinder performance), but I can tell you that they're quite heavy. Replacing them with something as light as a muffler delete system definitely takes weight off of the car and that's always a good thing.
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Old 05-18-2014, 07:21 AM   #6
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Axle back mufflers don't add any horsepower. Just saying.......
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Old 05-18-2014, 08:22 AM   #7
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Axle back mufflers don't add any horsepower. Just saying.......
+1.

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Old 05-18-2014, 08:57 AM   #8
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0 performance gains. Minimal gains with a catback.
S'all about the sound mang.

Stock mufflers do weigh a buttload tho, so changin them you'd be shavin off a decent amount of weight. I forget how much weight i dropped with my catback but i remember being really surprised.
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Old 05-18-2014, 10:17 AM   #9
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Thanks everyone. That's exactly what I thought. The things companies say for marketing... In the sound clip video the guy says what I quoted above, exact words. That's what got me confused.

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Old 05-18-2014, 02:15 PM   #10
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on my 14 v6 with mine replace with roush axle backs, my rear shocks seem to ride nicer LOL. sounds a lot better ,but did not notice any power diff.
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Old 05-18-2014, 08:54 PM   #11
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You'll feel the weight reduction. I did quite a bit because the stock ones are like concrete blocks.
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Old 05-18-2014, 10:36 PM   #12
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Having a Mustang and not having it sound bad *** is something of a issue for lots of owners. I don't get it but, to each their own. I've had big block street rods that would knock your fillings out and I thought that sucked. Quiet and quick works for me. Turbo cars are pretty quiet but that seems to be acceptable. On topic, aftermarket mufflers improving performance? Don't see it. It's all about the noise.
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Old 05-19-2014, 09:25 AM   #13
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Quote:
Originally Posted by Sakib View Post
I've done a lot of reading on this forum and on American Muscle about exhausts, listened to sound clips, and I think I've decided on the Magnaflow Street axle-back for my 2012 V6. Just one technical question that's bugging me. Why should an axle-back exhaust improve performance, assuming no other modification? Seems to me it shouldn't really improve the flow or reduce the back pressure. Are the stock mufflers really that restrictive? Or are axle-backs just for an improvement in sound, not in performance?
The main different between an aftermarket axle-back and your stock one is going to be sound. However, there is a chance you could see a couple HP gain. Nothing to write home about and nothing that you'll really feel. But on the dyno you may see a couple (1-2) HP improvement.

Hope this helps clear things up!

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Old 05-19-2014, 09:29 AM   #14
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A straight through muffler/axle back will allow more some negligible power gains that really are meant to streamline a full exhaust. Some mufflers in theory would net you 0 or lose some HP and gain 1-2 TQ.

If you grab the muffler and you can't see through one end out of the other, it will net you nothing.
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Old 05-19-2014, 10:05 AM   #15
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Magnaflow streets _ A YES from me

I don't know if you get more power but you sure will get a great sound without any drone. They also are much lighter, Made of Stainless steel, Have great looking tips and I'm sure your gonna love them.
If you look into your stock V6 tips you will see a small skinny outlet stuck into the larger tip. It is probably fine but it sure looks like crap to me.
I ordered my Magnaflow streets the same day I bought my car because of the "NO SOUND" of the stock mufflers. I also have a 2012. I'm more then happy with my Magnaflow streets


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Old 05-19-2014, 10:12 AM   #16
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Nice *** ronnie hahah
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Old 05-19-2014, 10:19 AM   #17
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Yeah, Ronnie, a post you made a while back raving about the magnaflow streets is what inspired me to look into these. Axle-backs might as well be considered an appearance mod, just the sense of sound rather than sight.

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Old 05-19-2014, 02:50 PM   #18
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Quote:
Originally Posted by Sakib View Post
Yeah that makes sense to me. On American muscle they say "you'll definitely see more power and sound versus your stock exhaust." I think they're just saying that to sell products... The difference should be negligible. The word "more" is not quantitative, so it's not like they're lying.

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I Donno if you can feel the difference cause I didn't feel it but there can be some gains depending what axel back you use.. I bought the pypes pype bombs and they literally weight like 10 pounds compared to our stock mufflers that each easily weigh 20 pounds.. So I could believe some gains from taking off roughly 40 pounds of weight I mean it's not drastic improvements but there are some gains.. But in terms of not refereeing to weight I don't think axel backs provide any form of benefit.. Even with a wide tipped axel back you still have the remaining of the pipe that can be constrictive
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