11-14 Mustang GT, 11-12 Shelby GT500 MRT Extreme Axle-Back

2011 - 2014 Mustang 5.0L V8 MRT Extreme Muffler Delete Axle-Back Performance Exhaust System 91A152
MRT 304 Stainless Axle-Back: 2011-2014 Mustang GT Coyote/ 11-12 GT500 #91A152
Alternative Views

MRT Part# 91A152 Loudness: 10 Drone: 2 Performance: 8

Application: 2011 thru 2014 Mustang GT Coyote convertible and coupe, and
2011 and 2012 Mustang Shelby GT500.
Doesn't Fit: 2013 and 2014 Mustang Shelby GT500.
Tune: None Required
Time to Install: 60 Minutes
Retail Price: $839.99
Your Price: $699.99

Price with Options: $699.99

Availability: Usually Ships in 1 to 2 Business Days

Available Options:

Product Details Technical Specs Installation Instructions
The Mustang GT Coyote/ Shelby GT500 MRT Exteme Axle-Back system has a loud, deep muscle sound. It is handcrafted in corrosion-resistant T304 Stainless Steel. Base systems include T304 polished SS 4" tips and 3" 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 the increased exhaust flow. The MRT Extreme is the loudest MRT axle-back. It is louder than the Sport Touring System. This Badass Axle Back has just enough exhaust presence with elevated sound to Get Noticed, Feel the Performance note, and packaged in a design without an excessive drone.

If you're looking to maximize performance, pair this axle-back with the MRT MaxFlow H-Pipe: HiFlow Cats 93P203-400.

2011 thru 2014 GT Coyote.
2011 thru 2014 Mustang GT convertible and coupe.
2011 thru 2012 Mustang Shelby GT500.
Doesn't Fit: 2013 and 2014 Mustang Shelby GT500.

Hear the Difference
  • How does it sound? The MRT Mustang GT Coyote/ Shelby GT500 Extreme Axle-Back #91A152 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!

91A152: Mustang GT Coyote/ 11-12 Shelby GT500 MRT KR Axle-Back Overview
  • 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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