Flowmaster proudly introduces our newest Cat-back exhaust system for the 2011-2012 Mustang GT. Part number 817560 is a 409S stainless steel Outlaw system for the 5.0L cars. Featuring our patented Scavenger X pipe for increased mid-range torque and mandrel-bent pipes throughout, the system is a full 3.00" diameter. Designed for the hard core enthusiast, the Outlaw Series mufflers deliver a very aggressive exterior tone, along with an aggressive interior sound as well. Polished 4.00" stainless tips provide the performance look to match the sound. While not for everyone, the Outlaw system is perfect for those looking for the most aggressive sound around, and the system is easily installable at home using the supplied hardware and detailed instructions. The US made stainless steel 817560 system is covered by Flowmaster's Lifetime Limited Warranty for long term assurance of quality.
Features:
- Mandrel Bent 16ga 409 Stainless Tubing
- Limited Lifetime Warranty
- Aggressive And Powerful Exterior Exhaust Tone
- Incl. Hangers and Hardware For Easy Installation
- Cat Back System
- Dual Out Rear Exit
- Dyno Tuned for Maximum Performance
- Premium Flowmaster Quality
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. Does Not Fit GT500.

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 |
GT |
2011 |
5.0L / 302 / V8 |
Dual; Dual Rear Exit; Incl. 3.0 in. Tubing/Outlaw Series(TM) Mufflers/4.0 in. Logo Embossed Stainless Tips; 409 Stainless Steel;50 State Legal / California Emissions Compliant |
Ford |
Mustang |
GT |
2012 |
5.0L / 302 / V8 |
Dual; Dual Rear Exit; Incl. 3.0 in. Tubing/Outlaw Series(TM) Mufflers/4.0 in. Logo Embossed Stainless Tips; 409 Stainless Steel;50 State Legal / California Emissions Compliant |