Introducing our new FlowFX(R) Axle-back exhaust system for 2011-2012 Ford Mustang GT coupes and convertibles with the 5.0L engine. Features include 3.00-inch mandrel-bent stainless steel tubing running into a pair of compact round FlowFX "straight-through" mufflers for a deep and powerful tone. The large 3.00-inch core mufflers ensure maximum performance, are constructed from bright 409S stainless steel and utilize the factory hanger locations for a quick and easy installation. The system is finished off with large 4.50-inch black ceramic coated stainless steel tips filling out the factory exhaust cutouts. Includes all necessary parts, hardware, and detailed instructions. Notes: Also fits 2012 Mustang Boss 302 model.
Features:
- Dyno-Tuned For Maximum Performance
- Limited Lifetime Warranty
- Deep Powerful Sound
- Quick And Easy Installation
Holley Performance Emission Code 5: This part is legal for sale or use on Emissions Controlled Vehicles; Uncontrolled (Non-Emissions Controlled) Vehicles; and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations
Installation Notes:
Fits 2011-2012 Ford Mustang GT 5.0L Coupes & Convertibles. Also fits 2012 Mustang Boss 302 model.

About Flowmaster
Manufacturer of performance exhaust systems, mufflers, performance air intakes, turbo boost modules, catalytic converters, race mufflers, headers and numerous exhaust accessories for late model cars, trucks, off-road, Jeeps, SUV’s, classic muscle cars, powersports vehicles and more. Flowmaster® gives you lots of exhaust choices with 12 designs of chambered mufflers, 3 styles of our exclusive “laminar-flow” mufflers and a new line of FlowFX “straight-through” performance mufflers, along with 5 sound categories of exhaust systems, giving you the customer, the power to custom tailor the sound of your vehicle whether you prefer mild, moderate or aggressive tones and sound levels. Since 1983, Flowmaster is the company you can trust, and has led the industry in offering only the best products you can buy for your vehicles.

Vehicle Fitment:
The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
Make |
Model |
Submodel |
Years |
Engine |
Fitment Notes |
Ford |
Mustang |
Boss 302 |
2012 |
5.0L / 302 / V8 |
Dual; Dual Out Rear Exit; Incl. 3 in. Tubing/4.5 in. Black Ceramic Single Wall Tip; 409 Stainless Steel;50 State Legal / California Emissions Compliant |
Ford |
Mustang |
GT |
2011 |
5.0L / 302 / V8 |
Dual; Dual Out Rear Exit; Incl. 3 in. Tubing/4.5 in. Black Ceramic Single Wall Tip; 409 Stainless Steel;50 State Legal / California Emissions Compliant |
Ford |
Mustang |
GT |
2012 |
5.0L / 302 / V8 |
Dual; Dual Out Rear Exit; Incl. 3 in. Tubing/4.5 in. Black Ceramic Single Wall Tip; 409 Stainless Steel;50 State Legal / California Emissions Compliant |