2015+ Mustang EcoBoost MRT Street Race Axle Back

2015 - 2022 Mustang EcoBoost Street Race Axle Back 91U903
MRT 304 Stainless Axle-back: 2015+ Mustang Ecoboost #91U903
MRT Part# 91U903 Loudness: 10 Drone: 2 Performance: 8

Application: 2015 thru 2022 Mustang 2.3L EcoBoost, 2015-2017 Mustang 3.7L V6
Tune: None Required
Time to Install: 60 Minutes
Retail Price: $712.78
Your Price: $593.99
Sale Price: $504.89

Price with Options: $504.89

Availability: Usually Ships in 1 to 2 Business Days

Available Options:

Product Details Technical Specs Installation Instructions
The Mustang MRT Street Race Axle Back system has a loud, deep muscle car sound and is handcrafted in corrosion resistant T304 Stainless Steel. Base systems include T304 polished SS 4" tips and 2.5" mandrel bent tube. Black Ops black matte tip finish is available for an additional fee. This system is engineered for the best sound to match your Mustang and provides increased performance from increased exhaust flow. The MRT Street Race Axle Back is the loudest MRT axle-back. It is louder than the Sport Touring Axle Back. This Badass series has just enough exhaust presence with elevated sound to Get Noticed, Feel the Performance note and packaged in a design without excessive drone.

Application: 2015 thru 2022 Mustang 2.3L EcoBoost, 2015-2017 Mustang 3.7L V6

Hear the Difference
  • How does it sound? The MRT Mustang Street Race Axle Back Axle-Back #91U903 has a balanced, 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 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!

2015+ Mustang EcoBoost MRT Street Race Axle Back
  • 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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Our Price w/ Options: $125.99
Sale Price: $475.19
Your Price: $289.00
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Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 1 Write a review »

5 of 5 Easy Makeover April 12, 2023
Reviewed by: Nick from NY  
Recently bought my eco boost love the car but it needed some exhaust tone it was to quiet.Twenty-minute job and the MRT axle back kit was on the car,while it's not the V8 rumble it makes the Eco sound good.