2011-14 Ford Mustang 5.0L Dynomax Ultra Flo Axle Back Exhaust Kit GT - S197

Mustang Dynomax Ultra Flo Axle Back Exhaust Kit (11-14) 5.0L

Details   |  Description   |  Videos   |  Customer Photos   |  Reviews   |   Community Q&A
  • 2011-12 Mustang GT Dynomax Ultra Flo Welded Axle Back Exhaust Kit
Mustang Dynomax Ultra Flo Axle Back Exhaust Kit (11-14) 5.0L

With this 2011-2014 Mustang Dynomax Ultra Flow axle back kit, you get great performance & exhaust tones!

Item #DYN-39504

Your Price: $349.97

Market Price:$359.99
You Save 2.86 % ($10.02)

In Stock
Ships today!

Add to cart


  • More Horsepower
  • Aggressive Exhaust Tone


  • Ultra Flo Mufflers
  • 3.5" Exhaust Tips
  • Slant Cut Tip Design

What's in the Box

  • (2) Ultra Flow Axle Back Mufflers

Made in the USA

Product Description

More Horsepower & Performance
Looking to bolt on more horsepower to your 2011-2014 Mustang GT? This Dynomax Ultra Flo axle back kit can add up to 13 additional horsepower & 13 additional ft/lbs of torque to your 5.0L motor. With Dynomax's Ultra Flow mufflers, you get a free flowing axle back kit that also gives you that famous American muscle car sound.

High Quality Construction
This axle back kit features 2.75" stainless steel, mandrel bent inlet pipes with OE flare connections to easily bolt up to your stock exhaust. Each Ultra Flo muffler includes a 10" double wall, buffed & polished 3.5" tip. This slant cut, stainless steel tip gives your S197 Mustang a clean new look!

-Fits 2011-2014 Mustang GT 5.0L

Product Videos

Mustang Dynomax Exhaust: Ultra Flow Kits

Check out our YouTube channel for even more tech tips, installation videos, how-tos, and more. The best place to go for anything Mustang related!

Customer Photos (1)

Product Reviews (2)

out of 5 stars
4 stars
2 reviews
5 stars    0
4 stars    2
3 stars    0
2 stars    0
1 star    0

2 of 2 REVIEWS
2 of 2 REVIEWS

4 Stars   Great sound!
By on 10/20/2014
After running Ultraflows on my fox body for years I decided to try them on my 13 GT. I Bought these to replace my GT500 mufflers and couldn't be happier with the change in sound. It's a deeper sound that's much quiter at idle than the GT500 mufflers. At WOT they get louder but not obnoxious. I was disappointed in the condition they arrived in though. The collector on one of them was dented which I was able to straighten out and one of the tips was dented and scratched. Dynomax should package them better to prevent this type of damage. The mufflers also sit angled once mounted, not flat like OEM. You could probably modify the inlet side of the exhaust and shorten the pipe to correct this but it should fit like OEM in my opinion. Overall I love the sound of the mufflers just a little disappointed in the fitment.

Yes, I would recommend this item to a friend!

Was this review helpful to you?

4 Stars   Love the sound!!
By on 10/25/2014
Image uploaded by Jeff M. Just put these on my 14 GT yesterday. I had Ultraflos on my '83 GT and my '00 GT before this and loved them. They are not loud, just deep and just right volume-wise. You could do a resonator delete to make these louder if desired. It is a 3" core and straight through design so can't be beat for overall flow. Fit was ok, but the Dynomax engraved tip is not centered on the top of my driver's side muffler. There is very little adjustment to the way this sits, so nothing I can do except cut and reweld it in the correct location. It's possible I could twist and bend the hangers to correct also. I also had to pull the clamps down REALLY HARD for them to bite onto the stock extension pipes. One other note is that the tips stock out pretty far, but they look great.

Yes, I would recommend this item to a friend!

Was this review helpful to you?

Vehicle Applications

Ford Mustang - 2011 (11) - 2012 (12)

About This Brand

Dynomax is a leader in the industry when it comes to providing Mustang enthusiasts with high quality exhaust components. From exhaust systems to mufflers, Dynomax has just what you need to get your Mustang sounding, performing, and looking better! Their exhaust parts are used everyday on track, drag, and daily driven Mustangs. Shop Dynomax Cat Back and axle back exhaust kits at LatemodelRestoration.com.

Look for Similar Items by Category

2010-2014 Mustang Parts » 2010-2014 Mustang Exhaust » 2010-14 Mustang Axle Back Exhaust
Ford Mustang Parts » Mustang Exhaust » Mustang Axleback Exhaust Systems

Products by Vehicle