10-19 Flex MRT Sport Touring Axle Back

2010 - 19 Ford Flex EcoBoost V6 MRT Sport Touring Axle Back Performance Exhaust System 91P900
MRT 304 Stainless Axle-back: 2010-2019 Ford Flex #91P900
MRT Part# 91P900 Loudness: 6 Drone: 2 Performance: 8

Application: 2010 thru 2019 Ford Flex Ecoboost.
Tune: None Required
Time to Install: 60 Minutes
Retail Price: $959.99
Your Price: $799.99

Price with Options: $799.99

Availability: Usually Ships in 1 to 2 Business Days

Available Options:

Product Details Technical Specs Installation Instructions
The Flex MRT EcoFlow Axle-Back has a loud, deep muscle car sound and is handcrafted in T304 Stainless Steel. This system includes 2.5" mandrel bent tube and dual 3.5" double wall, polished T304 stainless steel tips with beveled edges. This system is engineered for the best sound to match your vehicle and provides increased performance from increased exhaust flow. The EcoFlow Axle-Back has just enough exhaust presence with elevated sound to Get Noticed, plenty of opportunity to Feel the Performance and packaged in a design without excessive drone.

Application: 2010 thru 2019 Ford Flex AND Lincoln MKT 3.5L Ecoboost

Hear the Difference
  • How does it sound? The Flex MRT EcoFlow Axle-Back #91P900 has a loud, deep muscle car sound
  • Is there drone or resonance? The drone is noticeable but tolerable.
  • What if I step on it? Wide-open throttle increases exhaust loudness and tone to an aggressive performance sound.
Are you located close to Plymouth, MI and need your MRT aftermarket exhaust installed? Call MRT at 734-455-5807 to make an appointment today!

91P900: 2010 - 2019 Ford Flex EcoBoost V6 MRT EcoFlow Axle-Back Sound Clip
91P900: 2010 - 2019 Ford Flex V6 MRT EcoFlow Axle-Back Sound Clip
  • DIY installation for the backyard mechanic
  • T304 Stainless Steel for the best corrosion resistance
  • Engineered, designed and manufactured in the USA

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Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 5 Write a review »

5 of 5 Peppy & rumbling sound on my 2013 Lincoln MKT May 15, 2023
Reviewed by: Rakesh from California  
Got this "10-19 Flex MRT Sport Touring Axle Back" from Vivid racing and I got in touch with MRT team for my technical questions. The team is great with Dave helping me out on my concerns over the fitment. I was able to do this DIY in my garage, the instructions are straight forward. Requires a cut-off tool, hacksaw to get the cutting done.

My MKT now has a very sweet rumble at idle and not loud at all when accelerating. I can hear to that rumble inside the car cabin which makes you give that sudden throttle every now and then. Happy with the support and quality of the product !!!

5 of 5 Adds some power, sounds good, easy install! May 18, 2022
Reviewed by: Wyatt Dotson from Grand Rapids, Michigan  
First off, this exhaust sounds really good. Has a nice, aggressive idle from the outside but isn’t obnoxious. Sounds great passing cars on the highway too! Super easy install to do for yourself at home as well. Overall super happy with the quality of the product and will be shopping here again for future vehicles!

5 of 5 Adds some Pep! July 15, 2021
Reviewed by: John from Las Vegas  
Love my Flex but it's getting old. This exhaust gave it some more pep and makes it more fun to drive!

5 of 5 Easy install, sounds great January 25, 2021
Reviewed by: Zachary from Connecticut  
Installed these with a friend and took about 30 min. All you need is a saws all, a good level eye and a couple beers. Tone is nice and always enjoy the cold starts.

5 of 5 MRT Axle-Back Exhaust August 11, 2020
Reviewed by: Jonathon from TN  
Installed on a 2013 Flex Ecoboost and it sounds great. Driveway installation was easy.