Ford Mustang Exhaust for GT/GT500 (2005-2009)

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Part #: 403936

Financing available for purchases over $99 or more

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Prices stated here are only for sales within the continental United States and ordered via the web site. Prices for other territories, such as Canada, may vary due to shipping fees, duties, and other factors.

Orders placed via can only be shipped to areas within the continental U.S. If you live in Canada, please call customer service at 800-597-6874 for pricing and shipping costs. All other international orders must be placed through an authorized ROUSH dealer.

Product highlights for the Ford Mustang Exhaust for GT/GT500 (2005-2009):

  • Fits 2005-2009 Mustang GT/GT500
  • System extends from the catalytic converters-back
  • Utilizes 2.5” mandrel-bent piping with a straight-through design that provides added power, increased fuel economy, and aggressive tone
  • Can be used in conjunction with the factory GT/GT500 rear valance
  • Includes 4” tips made from polished 304 stainless steel
  • Includes all necessary clamps and hardware for installation
  • Check local noise ordinance levels for legality
The Ford Mustang Exhaust Extreme Performance Kit gives your Mustang that rumble sound letting other's know you mean business while increasing the horsepower and torque of your vehicle.

The increased power is generated due to the higher flow system as compared to a conventional exhaust system. Yet another benefit of this high flow system is that it improves fuel efficiency, as the engine runs into less air resistance to do its work. Fits 2005-2009 Ford Mustang GT/GT500

Though this particular exhaust for the Ford Mustang creates more sound outside your car, it doesn't create the typical off-road exhaust drone inside. This is made possible because sound is more effectively directed backward through the exhaust system and out through the rear of the vehicle.

**ROUSH Performance recommends checking your local noise ordinance levels prior to purchase.

Listen to the ROUSH Extreme Performance Exhaust Kit now:
1-2-3_Inside.mp3 (260 KB)
3_Revs_Outside.mp3 (208 KB)
Cruisin_Inside.mp3 (424 KB)
Drive_Away_Outside.mp3 (180 KB)
Drive_By_Outside.mp3 (204 KB)
Startup_Outside.mp3 (170 KB)
Startup_Rev_Inside.mp3 (336 KB)

The exhaust system is manufactured using a CNC bender to create smooth mandrel bends. This process maintains a consistent inside diameter through the bended area and allows for a significant increase in flow over stock/serrated-bent pipes.

This Ford Mustang exhaust kit is made from high-quality 2.5-inch diameter stainless steel tubing and has 4-inch diameter tips made from polished 304 stainless steel and embossed with the "ROUSH" logo. The system comes with OEM stainless steel exhaust clamps that provide a leak proof seal and won't smash or crush the pipes when tightened.

The ROUSH Resonator Off-Road Exhaust Kit fits 2005 - 2009 Mustang GTs and GT500s with factory rear fascia.
Application Mustang (2005/2006/2007/2008/2009)
Difficulty Intermediate
Time No
Tools Garage Tools
Instruction URL Download Instruction Manual
Install Video URL No

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