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I originally wanted the Roush axle back, but then I wanted more performance gains AND loudness and seen the magnaflow street catback, but the cayback cost WAY more and idk what I should do...
 

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I originally wanted the Roush axle back, but then I wanted more performance gains AND loudness and seen the magnaflow street catback, but the cayback cost WAY more and idk what I should do...
I bought Roush Axlebacks and simply went to my mufflers shop told them to cut out the stock piping and make me some 2 3/4 in piping for my car. Cost me 150 so I saved 200-300
 

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I was debating the same thing. I was never able to confirm it but someone on this forum mentioned that the 2013 V6 stepped up to 2 3/4" piping stock. If that's true, not sure how much additional gain there is in going with the catback design other than the mandrel bends. Anyone able to verify the diameter of the stock piping on the 2013?
 

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I was debating the same thing. I was never able to confirm it but someone on this forum mentioned that the 2013 V6 stepped up to 2 3/4" piping stock. If that's true, not sure how much additional gain there is in going with the catback design other than the mandrel bends. Anyone able to verify the diameter of the stock piping on the 2013?
Idk about the 2013's but my 12 sure didn't!

---------- Post added at 05:55 PM ---------- Previous post was at 05:53 PM ----------

Idk about the 2013's but my 12 sure didn't!
Stock 10-12 piping is 2 1/4
 

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I was debating the same thing. I was never able to confirm it but someone on this forum mentioned that the 2013 V6 stepped up to 2 3/4" piping stock. If that's true, not sure how much additional gain there is in going with the catback design other than the mandrel bends. Anyone able to verify the diameter of the stock piping on the 2013?
Did a quick search and found the post. My mistake though. The poster said the 2013 had 2.5" piping. Which I believe is similar to most aftermarket V6 pipes.

Flashjmg said:
i heard from AM on the phone that the stock v6 2013 piping is 2.5 inches like the ones that come with catback exhausts

http://www.mustangevolution.com/forum/f356/t314699/
 

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Idk about the 2013's but my 12 sure didn't!

---------- Post added at 05:55 PM ---------- Previous post was at 05:53 PM ----------



Stock 10-12 piping is 2 1/4
Not the 2010. It's running on the same 4.0 motor. I don't think they stepped it up from 04 so its a 2 inch.
 

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Good question. I haven't done a lot of looking, but it seems finding manufacturer dyno sheets for stock vs aftermarket exhausts is hard to come by. Many say the catback exhausts perform better than axle backs. It would be great to see a dyno sheet with overlay of graphs to confirm. I know magnaflow has dyno sheets but they are for the V8. AM's project V6 is a procharged 400 hp beast and according to their blog it looks like its running he Atak axle backs and a bbk offroad x pipe. This would suggest they still have the 2.25" stock piping. I could have missed some detail but check it out. Maybe shoot them an email to ask their opinion. Or maybe an AM rep will chime in here.
2011 V6 Mustang Project Car - Free Shipping!

My guess is 2.5" would be safe and show an nice increase in hp and tq. Going too large in diameter might cause some loss in a normally aspirated engine especially in the low end range. Again a dyno chart would be ideal and maybe some members have some they might share?
 

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My guess is 2.5" would be safe and show an nice increase in hp and tq.
Although if it's true that the '13 V6 comes with 2.5" piping and is still rated at same hp and tq as the '11-'12, then maybe there really isn't any gain....?
 

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Although if it's true that the '13 V6 comes with 2.5" piping and is still rated at same hp and tq as the '11-'12, then maybe there really isn't any gain....?
If the pipe is bigger then its better flow so it'll have some affect as far as breathing better. My 11 has 2.5" btw
 

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A 2013 V-6 needs Cat-Backs if Magnaflow.

Because of the changes in the Mustang Exhaust hangers you would need to get the Cat-Backs if you have a 2013 V-6.

As far as a fatter pipe giving you more power. Maybe a tad at the top RPM"s but you will lose some at the lower RPM"s where you spend most of your time driving.

The Magnaflow axleback Streets for the 2011/2012 V-6 don't fit the 2013.

Ronnie
 

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Have you heard them or driven in the v6 with them? They sound like an old v8. Not stepping on toes just saying what my ears and many others hear.
 

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get the catback...you will wish you had later. I love my Axle back Flowmasters...but after hearing the other at mustang week...sigh
 

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I'm guessing Mister Puma has never heard a Magnaflow

If he had he could never make a statement such as this:

The Puma said::
Stay away from Magnaflow. Too ricey. You won't like them.
My Magnaflow Street Axlebacks are not obnoxious and super loud. They have a very deep sound and do not sound like a jap car with a fart can as he wrongly suggests.

When I was at the all Mustang show in Media Pa. that American Muscle put on I heard just about every brand of Mufflers on the V6's that was ever made and I did not hear one single V6 that sounded like a RICER. Some were very loud and others very deep and much softer sounding. There are mufflers made to suit a lot of Mustang V6 owners and I have never heard any that sounded terrible. Some were way to loud for my taste but if that is what the owner likes it was a good choice for them to buy and install them on their car. I personally like my Magnaflow streets because they are not overly loud and with the nice deep rumble they put out sound great to me.

I suggest that anyone looking for a sound they like that they go to a few car shows and listen first hand to some Mustangs with aftermarket exhausts. Plus always find out if you have to cut your stock pipes to install or if any welding is involved. Proper installation is very important so do some research before you buy.

Ronnie
 
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